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  • Print China 2019
    Welcome to our booth 5-2294 in Print China 2019 from April.9th -13th!

    2019 02/20

  • ORIENT Imaging Mechanism and Application Analysis of Thermal CTP Plate
    Since Drupa 95, CTP technology has rapidly developed in the world, and the corresponding CTP plates are also rapidly developing. Data show that in 2003, CTP plates accounted for about 30% of the total plate material in the world, and it is estimated that by 2007 it will reach more than 60%. Among them, the thermal CTP technology is currently the fastest growing. The global thermal CTP installed capacity accounts for about 60% of the total, and it also accounts for more than 55% in China. The reason why the thermal technology develops so rapidly is because it has the advantages of high printing rate, high resolution and bright room operation, and is recognized as the development direction of future CTP technology. Many world-famous suppliers of plate materials, such as Agfa, KPG, and Fuji, have developed various types of thermal CTP plates. The thermal CTP plate is divided into two types of negative and positive patterns. The CTP version of the negative pattern is partially exposed during infrared scanning and the positive pattern is partially exposed. In addition, the CTP plate that does not require development after exposure is referred to as an exempt plate. It is currently a hot topic for various plates suppliers. The imaging mechanism of the thermal CTP plate is various, and the CTP plate can be classified according to its different. The following describes the imaging mechanism and application of various thermal CTP plates. 1, negative heat-sensitive CTP plate 1.1 Pre-heating thermal cross-linked negative chart CTP plate This is the earliest product that has been developed. The technology is very mature. It has a high degree of commercialization and practicality and is widely used. At present, all plate suppliers have production. This type of plate is usually made by uniformly coating a heat sensitive layer on a pelletized and anodized or coated polyester base plate. The thermosensitive layer generally includes a film-forming resin, a cross-linking agent, an infrared absorbing dye, and a photothermal acid generator. The imaging mechanism is: when infrared light illuminates the plate, the infrared dye absorbs light energy and converts it into heat energy, and the acid generator generates acid. Under the catalysis of acid, the resin in the exposed area produces a certain degree of cross-linking, forming a latent image. After preheating, the resin in the exposed area undergoes a sufficient crosslinking reaction, while the non-exposed area does not react. The non-exposed areas were removed by developing with alkaline solution. The imaging process is shown in Figure 1.

    2018 12/27

  • Orient Digital CTP Plate Quality and Performance Requirements
    As we all know, the CTP process can bring many benefits for printing: excellent image quality, near-perfect calibration, and rapid production turnover. However, its advantages are not only due to the imaging equipment, but also depend on the quality and performance of CTP plates. Here we will focus on several characteristics of the plate to see how they interact to assist the CTP equipment for digital plate making, thus affecting the image quality. This applies to all CTP plates, but is particularly suitable for thermal plates. At present, the global use of thermal plates has increased dramatically and has been recognized as the preferred medium for high-quality lithography. Requirements for aluminum base In traditional platemaking, whether or not a dot can be accurately positioned on a plate material depends to a great extent on whether the position of the imposition and registration register device is accurate when using a vacuum pump or a continuous copy device. In any case, this requires the plate to be quite flat when laid flat, but since the imaging process uses direct-contact exposure, the entire process can accept variations in the flatness of various types of plates, and the flatness of these surfaces is changed by Aluminium-based surface treatment caused by the production of traditional media. However, because digital printing plates are exposed by focusing energy from a laser light source, the requirements for the flatness of digital media include stricter treatment of aluminum-based surfaces. In addition, the use of energy-focused imaging in contrast to direct imaging means that no visible streaks will be visible when imaging on digital plates because no streaks will occur during anodization and graining of aluminum plates. Coating When applied to digital plates, emulsions must be smooth, uniform, and free of defects. Because the dot size generated on a laser platemaking machine is very small, any dust in the air during the production process of the reel, no matter how small, falls on the plate material, will lead to this personal image point. In fact, irregular images due to static spots are also visible, and they are very small and can't even be seen by a magnifier that checks traditional printing plates. The same uniformity requirement is also applied in the photosensitive coating of digital printing plate material. In general, when a traditional printing plate is exposed to ultraviolet light, the energy it receives is approximately 10,000 times the energy transmitted from the laser system to the digital printing plate coating in the direct plate making equipment. This means that in order to accurately meet the physical properties mentioned above, the emulsion coating of digital printing plates must be very stringent to achieve a specific range of spectral sensitization characteristics, satisfying synthetic materials (especially the molecular architecture in the coating), And the energy reaction is active. As a result, factories that produce digital printing plates require special, additional chemicals, and also require special production workflows. Operational requirements Compared with traditional media, CTP media also require different modes of operation during handling. Because many digital media imaging uses the edge of the plate as the key reference point for calculating the imaging position. Digital media has very strict requirements on the degree of edge straightness and evenness. Although this is only a minor issue for traditional media, if the edge of the digital media is not straight, unusual or damaged, the media will not work properly. service The final step in digital media production is to create and maintain a service team that can help printers solve problems anytime anywhere. This is a question that should be considered when evaluating any traditional and digital media, but it is especially important for digital media. Because printers that generally use CTP production are due to customers having a particularly strict time limit, this means that if problems arise, they must be resolved immediately. to sum up When comparing different digital plates or platemaking systems, it is worth noting that the final product is not a stack of plates sent to the pressroom, but rather printed by a faultless printing of precisely imaged plates on the press. Products. When considering the cost of producing digital plates, consider several important factors that have higher costs than traditional plates. The most important point is the demand for high quality raw materials. Thermal technology is the preferred technology for printers using CTP systems. Thermal plates will provide users with accurate quality and stable high quality.

    2018 12/14

  • Orient Application of Polyester CTP Plate in Small Offset Printing
    The low-end polyester CTP plate used in small offset printing is an offset printing plate made by a laser printer that prints images on a special polyester material. This kind of low-end polyester printing has stable performance, simple plate making process, and low price. It is particularly suitable for use on small format monochrome offset presses with 8 open sides. This kind of polyester plate needs to pay attention to the following problems in practical application. (1) Before printing on the machine, it is better to reinforce the printing plates and graphics by means of a forging machine so that the toner can be cured while the adhesion between the toner and the printing plate is increased. The product lines printed in this way are clear, crisp, and strong in three-dimensional. Under the appropriate pressure of the machine, the printing plate can bear 20,000 impressions of printing force, otherwise printing less than 5,000 copies will result in plate-off phenomenon, and the lines have obvious burrs. It is necessary to control the balance between the solid-state temperature and the solid-state time in the operation of the fixed-plate machine so that the printing plate is not deformed and the toner is sufficiently cured. (2) In order to prevent dirt, the printing plate must be fully moistened before it is placed on the machine. (3) There are two types of polyester plates on the market today: one is a water-based plate, and the other is a wetting plate. The water-based version can be made with ordinary tap water as a fountain solution without adding any substances; the dampening solution used in the wetting plate is the same as the ordinary PS plate. (4) Polyester plates on the market produce corrosive gases when imaged with a laser printer, which damages the components of the printer.

    2018 12/04

  • Orient Formula Principle and Wetting of Offset Printing Plate Wetting Liquid
    Offset printing plates have undergone the promotion stage of the use of protein plates, gravure plates, and PS plates. With the rapid development of printing technology and the popularity of multicolor high-speed machines, PS plates are popular and are suitable for some large-scale high-end printing products. Good performance, dark tone level, bright tone level reproduction ideal, PS version of the stability is good, not affected by the ambient temperature and humidity, long shelf life, easy to use, printing process is simple, easy to achieve data, standardized control , Has a good rate of India, and dot reproducibility, high resolution, good printability, less water, reducing the paper's flexibility and ink emulsification. In general, the PS plate production process is: aluminum version of the decontamination process - electrolysis and grinding sand eye - anodizing - sealing hole - coating emulsion - drying - PS version. 1. PS version of the trachoma formation: PS version of the photosensitive resin film is relatively thin, and therefore require the PS version of the trachoma delicate and uniform, the current method of electrolysis more. 2. The purpose of the anodizing of the blank part of the PS plate: to form an oxide film on the aluminum alloy plate of the PS plate, thereby improving the mechanical strength, wear resistance and hydrophilicity of the aluminum alloy plate. 3. The purpose of the PS plate sealing hole is to block the pores of the oxide film and prevent the plate from being contaminated. 4. Surface structure of PS plate 1 positive PS version Graphic Part - Diazo Compound Blank - Anodized Film 2 negative PS version Graphic section - Lac layer Blank section - Anodized film The photo-sensitive film of the positive-type PS plate is decomposed by light, and the photo-sensitive film of the negative PS plate is photo-polymerized. Shaiban process flow: exposure - development - washing - ink and finishing - glue. The PS version is flat from the macro perspective, but it is microscopically inconsistent. The positive version is microscopically speaking: The graphic part is high and the blank part is low. The negative version is microscopically speaking: The graphic part is low, and the blank part is high. First, PS version of the wetting liquid formula principles and requirements The formulation of the PS version of the wetting fluid must follow good wetting properties, the emulsification value cannot be less, and the pH of the solution is appropriate. The key is to solve the relationship between the wetting property and the emulsification value. In general, the wetting property is good and the emulsification value is large. 1.PS version wetting fluid must be able to fully wet the layout, in order to achieve the purpose of wetting the PS plate layout, it is necessary to reduce the surface tension, add surfactants, wetting agents, surfactants (carboxymethyl cellulose cmc) . The polar groups in 6501 surfactant, gum arabic and carboxymethyl cellulose (cmc) molecules can be firmly adsorbed on the solid surface, form and complement the colloid layer, and the colloid layer itself has very good water absorption performance. Therefore, the wettability of the printing plate is improved, and the emulsification is also not serious. 2. With cleaning ability. Can wash the dirty spots on the surface of the PS plate, only add acidic substances such as: phosphoric acid, nitric acid, citric acid, etc. These acidic substances have the cleaning ability. The plate of original offset printing plate gravure plate is zinc alloy, 0.4cm thick. The graphic part of gravure plate is lac, the blank part is the inorganic salt layer, and the inorganic salt layer is added by the acidic substance in the water bucket, added in the clear water. Some electrolytes have an enhanced and stabilizing effect on hydrophilicity and oil resistance, such as phosphoric acid, phosphates, nitrates, and the like. 3 has a very good non-lipid capacity. Added gum arabic, gum arabic has the role of hydrophilic colloids, the use of the non-lipid capacity of colloids and good water absorption capacity, to consolidate and stabilize the blank part of the four seals, and can reduce the amount of liquid fountain solution. At the same time, gum arabic also has the function of preventing the layout from oxidizing dirt and dirt and restoring the hydrophilicity of the blank part. 4. Can adapt to different climate changes. Add moisture absorbent and moisturizer. 1 Three hydroxyl groups of glycerol molecules can be adsorbed on the surface of the colloidal layer to help absorb the solution. 2 Polyethylene glycol is a good moisturizer. It can absorb moisture when it is shut down, and it is a good wetting agent to reduce the wear of the blank part of the printing plate. 3 The role of ethanol, ethanol (alcohol) (C2H5OH) can not only reduce the surface tension of the solution, but also use its volatility to make the paper absorb minimal moisture. 5. To stabilize the PH value. Adding buffer solvent, the hazard of PH value is too high: the network dot enlarges badly, the blank part is easy to get dirty, and the cleaning ability is poor. The hazard of PH value is too low: acidity is too large, corrosive to the printing plate, the printing plate's resistance to printing force is reduced, drying delays, the ink roller is easy to remove ink. The pH of the wetting fluid is preferably 4 to 5. Stable pH buffers such as: phosphoric acid and sodium dihydrogen phosphate have a buffering effect between them. H3PO4→H+H2PO-4 NaH2PO4→Na++H2PO4 It generates a homoionic effect between the gates, inhibits hydrogen production, and stabilizes the pH. In addition, both citric acid and sodium citrate have a cleaning action and a buffering action. [citric acid is a weak acid] 1 Citric acid H3C6H5O7 H3C3H6O7 H2C6H5O7 +H+ H2C6H5O7 HC6H5O7+H+ HC6H5O7 HC6H5O7H+ (The three-step ionization of citrate tribasic acid in solution, "" reversible reaction symbol.) 2 sodium citrate Na3C6H5O7 Na + +HC6H5O7 As most of the citrate HC6H5O73- changes in acidic medium, it is converted into HC6H5O72-ion, which produces a homoionic effect to maintain the proper pH, which is exactly in line with the acidity of the wetting fluid. 6. The loss of inorganic salt layer can be added. It is necessary to add acidic substances. The blank part of the PVA plate is the inorganic salt layer, and the wetting fluid must enrich the loss of the inorganic salt layer. The PS version does not need to be supplemented with inorganic salt layers. The blank part of the PS plate is an anodic oxide film, which is relatively stable to water and air. During the printing process, the electrolysis of the PS plate will not produce large wear.

    2018 11/28

  • Orient At All In Print 2018
    Orient attended All In Print 2018 in Shanghai from Oct.24th- October 28th, 2018. It was a great opportunity to introduce the new type of CTP Plates&CTCP Plates from Orient to the visitors all over the world. The company had a great time catching up with old friends, and got to talk to new friends and learn from each other.

    2018 10/31

  • 2018 Shanghai ALL IN PRINT
    Welcome to our booth N2B436 in Shanghai ALL IN PRINT from Oct.24th-Oct.28th

    2018 08/24

  • Orient Carton printing plate on the management and storage of flexo resin plate
    Corrugated box printing version, with flexible version as the first choice. Flexo printing has the advantages that other types of printing methods cannot match, and has outstanding environmental protection features. However, these advantages and characteristics must be reflected in the products. High quality products must be printed. Users can recognize and accept flexo printing. Therefore, how to purchase and use flexo is a problem faced by each carton manufacturer. There are two kinds of requirements for the flexo printing plate in the carton factory. One is to entrust the off-site co-workers to make the finished version; the other is that the plate-making equipment is self-produced in the factory, but in any case, it is necessary to understand why the flexographic printing plate is thoroughly understood. Things? The flexo printing plate used for preprinting cartons is thin, with a thickness of 1.7mm~2.84mm and a hardness of about 50o Shaw Class A. Currently, it is not widely used in China and is rarely used in factories. The flexo printing plate used after the carton is thicker, with a thickness of 3.94mm~7.00mm and a hardness of about 30o~45o in Shaw's A grade. Currently, most cartons are used, and the thickness is 3.94mm. For plates, proper storage and management are very important. The following is a brief introduction to the storage and management of flexographic plates in the case of sub-plate making, the whole box of plates and the finished plates. First, when making plates in the factory, the basic processing rules for plate storage are as follows: 1, unexposed media ◆ placed in the box, wrapped in black plastic film ◆ can not be placed on the uneven contact surface ◆The surface sheet can be peeled before exposure of the film ◆ After peeling, if it is bent too much, the protective layer will wrinkle. These wrinkles will leave a stain after the exposure of the plate. 2. The exposed media: ◆ Be careful with a piece of cardboard cushion under the anti-bend ◆ Use the original surface sheet to lightly cover the above protection 3, wet plate after washing ◆ Avoid touching the resin surface, otherwise it will form a stain ◆ Avoid inhalation of solvent vapors during processing 4. After drying, the plate is placed on a flat contact surface to cool it ◆ Do not touch the resin layer ◆ Protect from sunlight or other ultraviolet light Second, the plate material supplier to the entire box plate, in order to maintain the best state, stored as follows: ◆Temperature control: 5 to 25 degrees Celsius. When the temperature is lower than 10°C, the plate transferred to the plate making room must be stable for a period of time to avoid thermal shock effect on the exposure machine. ◆ humidity control, avoid excessive humidity (humidity within 60%) ◆ Placement method of packing box: all flat, no more than 10 boxes per stack Third, from the plate maker to the finished plate, storage requirements are as follows: ◆ Pure air: good ventilation, no dust, no solvent volatile gas, away from the ozone source ◆Temperature control: 5 to 35 degrees Celsius ◆ No light: dark room ◆ Plates do not touch each other: There is enough air circulation

    2018 08/21

  • Orient Thermal CTP plate type and its applicable characteristics
    To date, at least six types of thermal plates have entered the market and it is necessary to find a way to classify them. In the past, [generation" was used to distinguish different plates. The industry believes that using the word [generation" is not appropriate. It implies that [third generation" untreated thermal plate will replace the previous [first generation" and [second On behalf of the "thermal plate, and this may not be possible. It is better to define these plates as negative, positive, and non-treated thermal plates, respectively. First, the negative thermal plate The negative thermal plate includes a cross-linked photosensitive polymer plate. On this plate, a laser beam images the printed portion of the printing plate. The thermal laser beam heats the cross-linked photosensitive polymer until it "melts", does not dissolve during development, and the unexposed portion will dissolve, and the imaged portion will resist water and accept the ink. This process is the same as printing negative plates with negative film, so it is called "negative" thermal plate. Kodak PolyVision's Hot 830 media and Fujifilm's Brillia LH-NI are all included in this category. This plate is only imaged on the outer drum plateetter. The printing performance of the negative plate material is astonishing. Without baking, the plate can guarantee 250,000 printing. It has been reported that a printing plant has printed 700,000 copies without baking, and after baking, it can print more than 2 million copies. .Yangtu Thermal Plate Yang Tu thermal plate is a cross-linked photosensitive polymer plate. In this plate, the laser images the non-printed portion of the plate, and the thermal laser beam decomposes the photopolymer so that the imaged area becomes soluble during development and the unexposed portions remain insoluble. Since this process is the same as printing a positive plate with a positive film, it is called a "positive" thermal plate. The laser beam power required for this plate is small. This type of plate is suitable for internal drum type platesetters that do not require preheating, but require processing, which can increase the print throughput. Horsell's Electra DC is one of them, in addition to the EK's ThermalStar 830 and 1064, Fuji's Brillia LH-PI (830nm) and Brillia LH-PG (1064nm), Lastra Extreme 830, Plurimetal Cygnus and Toray. CTP Waterless 830. These plates are printed at 150,000-200,000 copies. Electra DC can be over 1 million after baking. Third, no processing thermal plate The non-treated heat-sensitive plate consists of an aluminum plate base coated with a hydrophilic layer, a hydrophilic layer, and a protective layer. The thermal laser beam melts the printed information into the hydrophilic silicon layer and can be printed without development. So far this year, in addition to Presstek's production of untreated plates, this year's Kodak Poly Lighting will also have products available. There are also two disadvantages to the non-treated plate material. The first is that the hydrophilic layer must be strong enough to achieve high throughput. This requires that this layer should be as thick as possible, but it also increases the difficulty of removing impurities from the melting process. The second is that these plates can not be baked to increase the print, because the baking plate will completely burn off the hydrophilic layer, it will lose the printed information. Presstek's PearlWel and PearlDry editions print about 20,000 impressions, while the new PearlGold edition with a thin, hydrophilic layer can print up to 30,000-40,000 impressions. KPG's untreated plate should be able to reach 50,000 impressions. Fourth, the conclusion Each of these three types of plates has its own characteristics. In the foreseeable future, these three kinds of plates will be applied. Therefore, thermal plates should be more accurately classified as positive, negative, and unprocessed plates, and should not use misleading "generations."

    2018 08/15

  • Orient the quality control of printing plate in offset printing plate
    In the offset printing of the optical disc, the printing plate is an important link between the plate making and the printing, and is an important factor influencing the printing quality. The so-called printing version refers to the process of faithfully transferring the dots on the photographic original (film) to the printing plate (negative pattern PS version) through actinic action. Due to the constraints of processes, materials, equipment and other factors, it is often difficult to achieve the purpose of faithful reproduction. Therefore, in order to ensure the quality of printing, we must control the quality of the printing plate, that is, the transfer of control points. Below, we will analyze how to control the correct transfer of outlets. First, the factors that affect the PS version network transfer: Through the analysis of the whole printing process, we can know that the main influencing factors are the following aspects: the quality of the original (film), the reproducibility of the plate, the printing machine and the light source. 1, the original (film) quality The ideal original quality should be a high dot density (D>3), a very solid idea, and a clean, hard spot. Such outlets have a large degree of exposure and development during printing and are easy to faithfully reproduce. The dot center density and the edge density must be the same, so as to expand the latitude of the exposure time, and completely transfer the dot. The original should be clean and free from dirt, otherwise it will be dirty. 2. Reproducibility of halftone dots Reproducibility of media outlets means that the photographic prints can reproduce the original web sites to the maximum during the printing process. The effect of reproducibility is mainly reflected in the resolution and film thickness of the plate. As the PS plate is a pre-coated photographic plate, its substrate is an aluminum plate, and a uniform photosensitive film layer is coated on the substrate. Therefore, the treatment process of aluminum base directly determines the quality of the plate. This part is often invisible to the users of the plates. Therefore, it is particularly important to ensure the quality of the plates through the purchase channels. If the plate is rough and the quality is poor, it will lead to a decrease in resolution, which will seriously affect the printing quality. Some inferior plates increase the thickness of the photo-resist film layer in order to mask the grain on the aluminum plate base. Doing so will result in an increase in the diffraction phenomenon at the time of exposure, which will result in decreased resolution and affect the print quality. The following are the effects of the quality of the media on the reproduction of outlets and their requirements: (l) Partial version, paste version The base of the printing plate should be clean, uniform in thickness, evenly distributed in sand, moderate in thickness, moderate in depth and depth. The photosensitive liquid is evenly coated with no bubbles or scratches. It is generally required that the average depth of the sand (Rz) is 5 to 7.5 μm, and the average roughness (Ra) is about 0.6 μm. This has affected the quality of the PS version, resulting in local rapid wear and tear, "flower pattern", paste version, and then appear off version and dirty. (2) PS plate surface roughness is not standard Abundance of coarse sand, so that the water is insufficient, easy to dirty: The sand is too fine, so that the photosensitive film in the microporous is not easy to clean, the base is easy to pollution, easy to dirty when printing. (3) Partially dropped words, lost version After the electrolytic roughening, the gray quality of the printing plate base is not completely removed, and the photosensitive layer is not firmly adsorbed. Before the coating of the photosensitive liquid, the plate surface is not rinsed cleanly, leaving traces of acid flow when hanged, which may cause partial plate-off. (4) not easy to ink PS version has been beyond the preservation period or improper storage, such as the preservation of the ambient temperature is too high (more than 30 °C), relative humidity more than 65%, too strong light, etc.: there is too low viscosity, photosensitive coating is too thin, causing PS printing on the machine is not easy to ink or not at all. 3, printing machine and light source When printing, it is required that the suction vacuum degree of the printing machine should be as high as possible to ensure good contact between the original plate and the printing plate, which is beneficial to the transfer of the dot; if the suction is not good, the spacing between the original plate and the printing plate increases. Large, it will lead to diffraction is very serious. The choice of printing plate light source is also very important. In the printing process, it is expected that the ideal light source should emit absolute parallel light, but the light source used in actual production can hardly meet this requirement. Usually in actual production, the light source is required to maintain a distance of about 1 meter from the printing plate so that the light emitted by the point light source can be as close as possible to the parallel light. Since the exposure is a photochemical process that subjects the photosensitive film to light and undergoes a chemical reaction, the process is affected by two factors, namely the illumination E on the image plane and the exposure time T. The energy obtained per unit area of the photosensitive film, ie the exposure (H) equals the product of the illumination E and the time T: H=E × T Therefore, to determine the size of the exposure, it is necessary to consider both the illuminance E (light intensity) and the exposure time T. The light source of the printing machine is generally a metal halide lamp. Such a light source decays after being used for a long time, resulting in a decrease in the illuminance E during exposure. Therefore, in the actual production, after the metal halide lamp is used for a period of time, it is necessary to increase the exposure time T according to the actual situation of the light source, so as to ensure that the exposure amount during the exposure during exposure is maintained. Correctly grasping the exposure time is very important for the printing process: overexposure will cause some small dots to be sunburned, which will result in the loss of brightness levels; and underexposure will cause the decomposition of the blank (non-textual) part to be incomplete. And easy to stain. Therefore, the following factors need to be taken into account in the exposure process: (1) Choose a light source that matches the spectral sensitivity of the PS platen-short wavelength light source (UV light source). On the one hand, it can shorten the time of printing, on the other hand, it can also reduce the thermal effect of long wave. (2) Minimize the effect of natural light on the PS plate. In general, the use of incandescent lighting is relatively safe, even after the exposure is complete, but also to minimize the light, to prevent the graphic part of the re-decomposition. (3) The exposure time should be coordinated with the development, as stable as possible, which is conducive to print quality. (4) During the period from the development to the printing, if the time permits, the plate should be dried as much as possible in the cool place to prevent the damage of the photosensitive layer caused by strong light or high temperature. In the printing process, in order to ensure the accurate reproduction of the network points, we must pay full attention to the tight integration of the original version and the PS version. The unevenness of the printing glass and blanket, the dirt of the dust pad, the adhesive tape and dirt on the film, and the insufficient vacuum between the film and the PS plate will cause the adhesion of the film and the photosensitive layer of the plate. Inadequate, resulting in diffraction when the light passes through, causing the dots of the printing plate to appear imaginary, narrow, or non-ink-absorbing white spots, affecting the reproduction of the dot, leading to a decrease in the reproducibility of the image reproduction, and the quality of the printing plate will not be ignored. Impact. In addition, the aging of blanket printing blankets will cause a small amount of air leakage at some edge positions, which will also cause the PS plate and the film to stick tightly, making the drying out of the picture. Since each optical disc company is equipped with a developing machine at random when the offset printing machine is purchased, and each type of developing machine has a similar function and structure to the Japanese Toray development machine, it can be set according to the developing speed recommended by each device manufacturer. However, it should be noted that the pre-treatment solution must be replenished in time according to the number of plates. Otherwise, the concentration of the pre-treatment solution will be insufficient, and the development speed will not be adjusted, resulting in incomplete decomposition of non-graphical components, resulting in blurred plate images and easy Dirty. Water is the Toray PS version of the developer, so ensuring water quality is critical. It is recommended to clean the filter once a week and change the water. The post-treatment solution is mainly used to color the dots so as to observe the reproduction of the dot after development. Because we can't distinguish the transfer of the dots with the naked eye after the print version of the PS plate, we must use the developed image to determine the reproducibility of the dot, so the control of the developing stage is also very important. In particular, the temperature of the pretreatment liquid (usually set at 38°C or more for the developer to start) and the concentration, water quality, etc., as well as the height of the brush and the hardness of the bristles all affect the development. We can visually compare the developed dots with the dots on the film with a 15x or more magnifying glass. If the size is comparable, it is proven that the printing and development are relatively normal. If they do not match, you must find out the reason and resolve it as soon as possible. Due to the high latitude of the development, it can be detected once a week.

    2018 08/07

  • Orient Type of printing plate
    To date,Orient at least six types of thermal plates have entered the market and it is necessary to find a way to classify them. In the past, [generation" was used to distinguish different plates. The industry believes that using the word [generation" is not appropriate. It implies that [third generation" untreated thermal plate will replace the previous [first generation" and [second On behalf of the "thermal plate, and this may not be possible. It is better to define these plates as negative, positive, and non-treated thermal plates, respectively. First, the negative thermal plate The negative thermal plate includes a cross-linked photosensitive polymer plate. On this plate, a laser beam images the printed portion of the printing plate. The thermal laser beam heats the cross-linked photosensitive polymer until it "melts", does not dissolve during development, and the unexposed portion will dissolve, and the imaged portion will resist water and accept the ink. This process is the same as printing negative plates with negative film, so it is called "negative" thermal plate. Kodak PolyVision's Hot 830 media and Fujifilm's Brillia LH-NI are all included in this category. This plate is only imaged on the outer drum plateetter. The printing performance of the negative plate material is astonishing. Without baking, the plate can guarantee 250,000 printing. It has been reported that a printing plant has printed 700,000 copies without baking, and after baking, it can print more than 2 million copies. .Yangtu Thermal Plate Yang Tu thermal plate is a cross-linked photosensitive polymer plate. In this plate, the laser images the non-printed portion of the plate, and the thermal laser beam decomposes the photopolymer so that the imaged area becomes soluble during development and the unexposed portions remain insoluble. Since this process is the same as printing a positive plate with a positive film, it is called a "positive" thermal plate. The laser beam power required for this plate is small. This type of plate is suitable for internal drum type platesetters that do not require preheating, but require processing, which can increase the print throughput. Horsell's Electra DC is one of them, in addition to the EK's ThermalStar 830 and 1064, Fuji's Brillia LH-PI (830nm) and Brillia LH-PG (1064nm), Lastra Extreme 830, Plurimetal Cygnus and Toray. CTP Waterless 830. These plates are printed at 150,000-200,000 copies. Electra DC can be over 1 million after baking. Third, no processing thermal plate The non-treated heat-sensitive plate consists of an aluminum plate base coated with a hydrophilic layer, a hydrophilic layer, and a protective layer. The thermal laser beam melts the printed information into the hydrophilic silicon layer and can be printed without development. So far this year, in addition to Presstek's production of untreated plates, this year's Kodak Poly Lighting will also have products available. There are also two disadvantages to the non-treated plate material. The first is that the hydrophilic layer must be strong enough to achieve high throughput. This requires that this layer should be as thick as possible, but it also increases the difficulty of removing impurities from the melting process. The second is that these plates can not be baked to increase the print, because the baking plate will completely burn off the hydrophilic layer, it will lose the printed information. Presstek's PearlWel and PearlDry editions print about 20,000 impressions, while the new PearlGold edition with a thin, hydrophilic layer can print up to 30,000-40,000 impressions. KPG's untreated plate should be able to reach 50,000 impressions. Fourth, the conclusion Each of these three types of plates has its own characteristics. In the foreseeable future, these three kinds of plates will be applied. Therefore, thermal plates should be more accurately classified as positive, negative, and unprocessed plates, and should not use misleading "generations."

    2018 08/01

  • Orient Influence of CTP plate making process on CTP plate
    For long-run printing, the life span of the CTP is a very important indicator, which is related to production cost and production efficiency. The plate making process has an impact on its life. CTP plate printing technology generally does not cause problems in the development process of traditional printing plates and films, but in the field of computer direct plate making, the development process will trouble us like a devil, and it affects the production of printing plates anytime and anywhere. quality. Therefore, we should incorporate the purchase of developing equipment into our investment strategy when we introduce CTP plate-making equipment. We often encounter such a situation in the usual printing production process: the newly installed plate has just been printed for a while, the plate is dirty, and our workers report the quality of the plate. In fact, the reason for this phenomenon may be caused by the printed version of the body, it may be due to improper development. Let's discuss the effect of plate development on the quality of printing plates. 1. If the light path of the CTP platesetter has not been cleaned or focused for a long time, it will cause the laser energy output on the surface of the plate to be lower than the laser energy value required for the photopolymerization of the plate, so that the photosensitive layer on the surface of the plate cannot be The photochemical reaction of photopolymerization is completely carried out so that the photosensitive layer in the graphic part cannot be completely cross-linked, resulting in a decrease in the life. Therefore, the light path of the plate making machine is regularly cleaned and corrected to ensure that the laser energy on the surface of the plate is correct, so as to ensure the normal life. 2.The plate cannot adhere to the drumhead properly in the CTP plate making machine, which will cause the laser energy on the surface of the plate to be incorrect, and it will also lead to a decrease in life. 3. The important role played by the pre-heating of the plate squeezing machine is to make the photosensitive layer, which has produced a photochemical reaction on the surface of the plate, be further cured on the aluminum plate of the plate material, so as to increase the lifespan. If the pre-heating temperature is too low, the photosensitive material does not cure well on the surface of the plate, resulting in a decrease in life. 4. The developer concentration, the temperature is too high or the development time is too long in the process of lithography, and the lifetime of the photosensitive layer is reduced due to corrosion. 5. If the amount of post-wash water is insufficient during the process of stencil printing, the remaining developer continues to erode the photosensitive layer and result in a decrease in life. 6. Some protective adhesives will react with the photosensitive layer. If you do not use the protective adhesive of the CTP plate properly (it is recommended to use the original protective adhesive), it may also result in insufficient life. 7. If the temperature and humidity of the CTP room are extreme, it will also affect the life of the plate. 8. If the temperature is too high or too low in the baking plate, if the time is too long or too short, it will lead to a decrease in life.

    2018 07/24

  • Orient gravure printing block analysis
    Orient gravure printing block analysis In gravure printing, the transfer rate of the ink is generally 60% to 80%, and 2/5 to 1/5 of the ink will remain in the cells. When the ink transfer rate decreases, the printed image will be blurred and the writing will be blurred. The lines are unclear, especially in the shallow part. When the blockage is severe, normal production will also be affected. The main reasons for blockage are as follows: (a) Causes of Ink 1. High ink viscosity, uneven distribution of ink in ink, poor leveling. 2. The solvent volatilizes too fast, or the solvent used is not very soluble to the pigment. 3. The depth of the printing plate immersed in the ink tank is not enough and the ink is bad. To solve this problem, we need to properly reduce the viscosity of the ink, or use a slow-drying mixed solvent to reduce the solvent evaporation rate. Increase the ink tank position. (B) The cause of the scraper and its solution 1. The squeegee is in an improper position and the squeegee is too far away from the embossing point. 2. The blade angle is too large or the blade pressure is too high. To solve this type of blockage problem, it is necessary to properly adjust the pressure of the blade and the angle of the blade, so that the blade is closer to the embossing point, and the hot air in the drying box is prevented from leaking out of the platen. (3) Reasons and Solutions for Printing Plates 1. When the printing plate is used, the down time is too long or the plate hole of the printing plate is not cleaned after the last printing. The plate hole of the printing plate is dried by the ink, resulting in blocking the plate. 2. The depth of the plate is too deep, and the net cleaning is not clean, resulting in blockage. 3. The printed version is of poor quality and the cyberspace is inverted. With this type of problem, the plate should be rechromed. (d) Other causes and solutions When the pressure is too light or the printing speed is fast and the imprinting time is short, resulting in blockage, the pressure should be increased appropriately. Higher ambient temperature or lower relative humidity, more dust in the air, due to electrostatic dust, etc. can also lead to blockage, so maintaining a clean working environment can also reduce the generation of blockage phenomenon.

    2018 07/16

  • Orient printing plate Carrying out "quality evaluation" activities
    2018 is the eleventh annual flexographic product quality exhibition activity held by the Flexography branch of China Printing Technology Association every two years. The event was strongly supported by Jiangsu loment limited and was named "the Australian Cup". It is committed to the development and production of a full range of printing equipment. In the hope of organizing the "Hua Guang Cup" quality evaluation activities jointly with the China India Association for soft printing, we should try to change people's preconceptions about the offset printing and intaglio printing in the light of the problems in the soft market, and make people more rational, popular and green printing. In the crowd, we should popularize and improve the technology of flexographic plate making and promote the development of flexographic printing, in order to promote the popularization and development of green printing in China. This activity is aimed at the whole country, which aims to promote the wide exchange of China's soft printing technology and technology, to make up for a long time, promote each other, improve together, and promote the development of equipment, equipment and materials in the chain of flexible printing industry, so as to further promote the development of China's flexo printing industry and the promotion of product quality. The product evaluation method of this quality exhibition is as follows: First, the exhibits will be selected according to the corrugated cardboard boxes, cardboard boxes pre printed, paper and adhesive, non absorbent materials and student internship. Two. The sending and evaluation printing should be an uncut coil material, and the samples sent must be five consecutive samples in different columns. If there is any difficulty, repeat printing must be longer than three consecutive sheets. Three, the standards of this review are awarded by experts according to the complexity of the evaluation products and the level of production, and then the quality award, the outstanding award and the masterpiece award are awarded on the basis of the comprehensive score. The best prize is 10% of the total, 15% of the excellent and 25% of the best. The award-winning products will be awarded and displayed at the twelfth annual meeting of the flexo branch in 2018. It will also participate in the future exhibition, and will also be published in the Chinese print magazine. Four, the complexity of the printing parts is determined according to the following items: A and printing precision requirements; B, the complexity of printing process; advanced products of C, new technology and new technology; D, fine degree required; E, tonal range; F, detectable degree of defects. Five, the printing level of printed parts is determined according to the following items: A, printing precision; B, ink cover; C, graphic definition; D, dot blooming degree; E, ink color consistency; F, difficulty increase value. Six. The samples are printed after July 2016, and each sample is sent to 5 pieces. The samples were sent to the China India Association flexography sub committee with the deadline of July 31, 2018.

    2018 07/09

  • Orient printing plate Holding "obedience to the party arrangement"
    In the light of the spiritual requirements of the central and two level group companies on strengthening the party's organizational life, the Party committee has recently issued and issued a notice on the establishment of a "theme party day" system (hereinafter referred to as "the notice"), making arrangements for and deploying the "theme party day". The notice puts forward the main objectives, organizational forms, contents and requirements of the activities. By carrying out the "theme party day" activities, we should further strengthen the party party spirit and Party members' consciousness, further stimulate the party's organizational life, improve the quality of the organization, strengthen the actual effect of organizational life, strengthen and improve the political life of the party in an all-round way, and build up the political foundation of the party's strict administration of the party. The first Friday of every month is the time for the theme party day of all kinds of Party branches. In principle, every Party member of the Party branch should take part in the "theme party day" of the branch, and the "theme party day" is usually organized by the Party branch as the unit. "Theme party day" should focus on serious political activities within the party, strengthen the education and management of Party members and enhance the attractiveness of the party's organizational life, and organize relevant activities. The key points include the monthly payment of Party membership fees, the collective reading of Party Constitution, the organization of centralized learning, the development of organizational life, the grading of ratings, and the implementation of democratic deliberations. The party organizations at the grass-roots level can carry out the special activities in carrying out the key tasks of the party building at the grass-roots level, playing the role of the fighting fortress of the party organization and the vanguard role of the party members, in combination with the Department and the reality of the unit. First, adhere to the monthly pay of the party; two, adhere to the repeated reading of the party constitution; three, adhere to deepening the party rules and regulations Party learning; four, adhere to the standard organization of life; five, adhere to the implementation of democratic deliberation; six, innovation and optimization of the content of the content carrier. Activity requirements, strengthen organizational leadership; highlight political attributes; strict discipline requirements; create a strong atmosphere.

    2018 07/03

  • Orient Energy Saving
    Orient Since 2018, under the leadership of the leaders at all levels of the company and the business department, the offset printing plate department, from the aspects of energy management, equipment modification and optimization, and the optimal control of production process, will dig deep and reduce energy consumption. The results of energy saving and consumption reduction in the first half of the year are remarkable. The Ministry of energy increased energy control and control as the focus of energy work, and further explored the potential of energy conservation. The maintenance workshop arranges special people to collect and collate the data of the important energy control points such as the water, electricity, steam, gas and cold of the No. 1 and No. 4 production line, and the data of the important energy control points of the air vents of the hall air conditioner. The abnormal energy consumption is found in time and processed in time, which greatly reduces the equipment failure and defects. Energy waste; at the same time, the process workshop optimizes the water washing process, and the water saving effect is obvious. The Ministry of business increased the energy consumption assessment of the process teams, improved the attention of the operators on energy consumption, improved the bad habits in the process operation to the maximum, and reduced the waste of energy. Through the joint efforts of the staff of the Ministry of business, the average consumption of water, electricity, gas and cold of line 1-4 was 21.22%, 6.32%, 3.92% and 15.67% compared with the same period of last year in 1-5 months, and the steam ratio increased by about 1.6% compared to the same period in the heating season of the year.

    2018 06/28

  • 2017 China Print in Beijing
    Welcome to our booth E3-031 in Beijing China Print from May.9th-13rd!Our printing plates are stable with reasonable price.

    2017 03/24

  • Orient Team in Drupa 2016
    Once again DRUPA 2016 has been a great success for Orient judged by the large numbers of visitors who we have attended to on our stand. During this printing show,we have presented new products that have been received with great interest: the IRIS-PREMIUM double layer CTP plate with UV ink resistance and the IRIS-F environmental processless plate.We thank all visitors and the organization of DRUPA for this continuing success.

    2016 11/23

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