1. Design of digital printing
The biggest advantage of digital printing is its processing of the manuscript, and it can maximize the use of the manuscript. Color digital printing can achieve the quality effect of offset printing when copying the original manuscript. If digital printing can't handle the manuscript, start with a high quality manuscript, scan with the right pixels, and a high quality scanner, often 300 dpi. Can get satisfactory results. Since it is not offset printing, so we should also pay attention to its bright and dark tone parts.
2, carefully select the printing materials (paper)
Digital printing is unlike offset printing, where it usually does not use the same kind of paper. In-di go E — The printing press requires a preprocessing of the paper. The Xeikon-based press uses roll paper, and not all papers have roll paper. It is important to remember that the paper must be able to hold negative charges, and a smooth, extremely valuable white paper is the best choice for digital printing. Because the coating agent will not be coherently stuck or erased, the recycled material can be avoided, and the humidity can also destroy the reproduction of color. In addition, remember to ensure that there is enough paper in the plant for at least 24 hours before the work operation.
3. Positioning set
We should always know the design and positioning units, pay attention to the automatic duplex features of special machines, and test the duplex items to ensure acceptable results. The Xeikon printing press prints both sides at the same time to get a good positioning from front to back. If bleeding is found, a larger size should be used.
4. Pay attention to remove the stains (defects)
Digital printing cannot print dot colors (except for the indigo 6-color version), using PATONE TM Spot-to-CMYK charts to find the CMYK counterparts, you can produce reasonable substitutes for many PANTONE TM colors. Very thick finish (colorizer) coverage often presents a luminous phenomenon that looks like a metal ink.
5. Observe the field and overprinting
In color reproduction-based devices, large areas of field printing is the most common problem. They may be due to the charge of the paper surface and the charge itself changes. To some extent, the electrostatic charge on the sheet-fed surface also changes, resulting in stripes and uneven colors on the field block, away from the updated system. Create miscellaneous spots by using Photoshop or other software. This problems rarely occurs in new presses than in the old presses.
On the contrary, if you want to obtain a large area of black field, use a yellow, product, green and blue ink according to different proportions of the thick black ink. It is recommended to work with your supplier to find and seek the best ink quantity ratio. Try coloring at 60C, 40M, 40Y, 100K or 40C, 4020M, 20Y, 100K, using all four colors, not just the C ink used for offset printing.
Digital printing can be operated at 400 to 600 dot / in to mimic tone points by generating a grid. Because starting with fewer outlets in the manuscript, the grid is limited in size by the tone line selected and the amount of outlets available. If only a limited amount of shadow is available, the smooth transition in the whole order and mixed color is difficult, and adding stray points (in Photoshop) allows some less significant changes in the digital printing device to observe its overprinting color from dark to bright.
6. Observation of the monitor (monitor)
The display displays a wider range of images than digital printing, and proofing devices, such as inkjet proofing, have a high resolution, and Epson inkjet proofing can be made at 720 dpi or 1440 dpi. It is best to sample on the machine, for replication production, and make color blocks, for the printing machine or proofing, in order to correct the color, of course, advanced, advanced color management system is also a good solution. At present, some suppliers are able to provide an advanced color management system.
7. Choose the right software
Quark Xpress, Adobe, Indesign, Photoshop, FreeHand and Illustrater, The various software is slightly different in color, If the same color generates images in Illustrater, FreeHand, and Photoshop, And then import them into either Pagemaker or Quark Xpress, Transform all of the artwork to the color space of CMYK, Then the colors of these three units will not simply match, si op. sit, Adjust the color to the color balance. Avoid using text processing like Microsoft Powerpoint and RGB graphics, and text processing tends to work only in the RGB color space. RIP will instantly need to convert RGB colors and may not give the color you expect.
8. Collect products
Be sure to include all the fonts and connected graphics files (and do not embed the graphics by cutting and pasting), save the files in the appropriate format, and digital printing companies prefer the page description type 1 fonts. You can provide a file in the Adobe PDF format.
9, the immediate post-processing
Digital printer products will produce problems in the binding stage of making, that is, possible paper curl or paper particle roughness and other problems. The agent, unlike ink, appears on the surface of the paper and cannot be absorbed. When folding, the agent is easy to break at the crease, so avoid the printing design of the crease, or use high light in the crease area or at least detect the granularity of the paper to reduce the degree of rupture, if the print is a book, sheet printing, the positioning is a problem, the text and the text part should not exceed the post code.
Special care or careful consideration to avoid the text over the code, avoid too tight positioning, allow a change range of 1 / 8 in. If it is thick paper, make sure that the graphics and creases, in the paper code, not over the post code, to reduce the paper and polish cracking, the better printing press can deal with these usual potential faults. If your product is very detailed, always carefully select the digital press and carefully examine the product prints (samples) printed by the digital press.
10. Learn more about the product and equipment
In most cases, you can't design a variable printing job and give it to any service provider, you should be careful to know what the device can do and can't do. Then design the homework according to its limitations.
Source: http://news.naliyin.com/
