How to narrow the gap between actual printing and

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How to narrow the gap between actual printing and proofing

printers are looking for various ways to improve and simplify the production process, whether engaged in offset printing, flexographic printing or digital printing, in order to cope with the constantly compressed profit space. One way is to ensure that the finished products obtained by customers can meet their expectations, so as to avoid re production and re printing. This means that an accurate and high-quality contract proofing is very critical

proofing has always been a headache in flexographic printing. Some people may say that the best way to show customers the effect of finished products is to print them directly. However, this method is not easy to implement, not only the cost is high, but also the cycle is long. When other printing processes are used, relatively simple inkjet proofing can usually be used to simulate the actual printing effect. Flexographic printing is relatively special, and the dot expansion law and angle addition are different from other printing methods. In addition, spot color and metal color printing are also widely used in flexographic printing

the problem often encountered when proofing flexographic printing is that the main substrate material used in the proofing process is white paper, which is rarely used in the final products of the flexographic printing market. The only way to get real proofing on actual materials is to conduct wet proofing, which is beyond the cost bearing range of many printers. The alternative technology is to use specially developed technology and cooperate with high-standard inkjet proofing machine to accurately reproduce the real printing effect

therefore, the technical requirements for flexographic printing are relatively high. Printers should have a rip that can drive accurate and reliable output devices. Rip of professional flexographic printing proofing system can reproduce the flexographic printing effect involving many variables, and then output an image that meets the quality specified in the contract to the proofing machine. The quality of proofing is very important. The proofing quality of Epson equipment is unparalleled, so the market share of proofing is the largest in terms of 5g characteristics. Epson recently launched four new 8-color printers, namely stylus Pro 4880, 7880, 9880 and 11880. These four printers all use Ultrachrome K3 technology with bright magenta ink that can improve image effect, and the print head also uses the award-winning micropriezo technology, which also ensures that high-quality samples can be printed at a relatively reasonable cost

the flexoproof system from GMG company can reproduce the proofing effect of actual substrate materials, such as corrugated board. In fact, any low-quality paper can be simulated by changing the image noise. GMG's products have always supported Epson stylus Pro printers, making full use of the transparency and density of Ultrachrome K3 ink system and the accuracy of micro piezoelectric print head technology, which has the accuracy of ultra micro dot inkjet

starproof system from compose system solves the complex problem of point structure by analyzing the shape and angle of CMYK points. This analysis is provided by the actual dot system, which can reproduce the original additive point shape with proofing resolution. When sent to a high-resolution printer, such as the Epson stylus pro4880, it can output high-quality proofs with sharp points, clear images, accurate colors and fine levels

the dot addition of flexo usually requires a small adjustment of the height or width of the dot to compensate for the dot expansion during printing. The starproof dot distortion tool can generate the correct addition points based on the deformation ratio or expansion ratio of the original under the control of the user, and expand the deformed points to the original correct size. Starproof can also compensate for the loss of dots during flexo transfer during the printing process. By inputting the size value of dot lost, the extra points smaller than this size will be removed and will not appear on the proofing sheet, which is in line with the actual situation of printing

most rip processes spot colors in the same way, that is, through software analysis, convert the spot color to the closest CMYK value. Openrip flexo, launched by advanced proofing of xante company, is a low-temperature end face friction and wear testing machine that can print composite colors or specific color measurement data, temperature rise, friction coefficient and other values for printer proofing and customer proofing. The screen displays the end face friction and wear testing machine color. It is also possible to change the spot color in rip, which can reduce the amount of ink required for overprint, and preview the effects of printing restriction, overprint and hollowing out. Openrip uses koolkolor inkjet proofing technology that can manage ICC Color and color management files of target devices, which can simulate the final printed products

gmg's flexoproof supports all standard spot color systems, such as hexachrome or Pantone spot color libraries, which are provided with products. An image can be divided into 64 colors at most, and there is no limit to the total color separation of a printing variety. These colors are stored in the database, and users can add colors to the database as needed. Using the flexoproof solution, color opacity and related printing order can be specified on demand, and even white backing can be specified as spot color

the early problems can also be solved through GMG's flexproof. In addition to processing almost all industry standard prepress data formats, flexoproof can also process the final 1-bit data, such as the data obtained by CTP rip. These data are color changing using the initially retained point information. The material provides a new selection management for the palette of automobile manufacturers. Its control method is: set a target temperature instead of going to the information. In this way, errors such as tone discontinuity, moire and trapping can be found early before the exposure of the printing plate

rip can output high-quality results is a problem, and the final proofing effect may be another matter. If the color goes beyond the gamut, the proofed sample will be completely different from what you think. The proofing machine needs to be able to output the modifications made by the proofing system. Epson large format printer has a good reputation in color performance, thanks to the outstanding performance of Ultrachrome K3 ink, which has certain water resistance, can dry quickly after printing and has excellent light resistance. Unlike the traditional use of a single black, Epson ultrachromek3 ink uses three different concentrations of black ink to achieve a more stable and accurate gray scale balance, and uses less color ink to achieve more accurate color control. Coupled with the printing resolution up to DPI, it can completely match the output effect of rip

through high-quality contract proofing, the gap between samples and finished products is gradually narrowing. The closer the effect of the sample output by the proofing equipment is to the final product, the happier the customer will be. Although professional rip suppliers such as GMG, xante and compose system have made great progress in technology, coupled with the cooperation of Epson inkjet printer, the proofing technology of flexographic printing has taken a big step forward, but the proofing of flexographic printing has not reached a perfect level

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