Printed matter is dotted with our lives, a gorgeous color to our life. Then print qualified with what characteristics? Printing the popularity of the surface to be very wide, but also a lot of problems that need attention, today only its printing plant in Qingdao explain, what color the most difficult to print, the design should pay attention to what factors.
The first is the superposition of several color dot, especially more than 70% outlets. Specifically, dark brown, dark green color, Coffee (flat screen, containing blue 70), deep blue, violet blue due to the presence of color difference, not easy to find a balance in the printing machine, so it is difficult for printing color.
The second is the gray balance, according to the theory and practice of production experience, the most difficult to control the printing color is gray balance. Gray balance is in certain printability, from shallow to deep yellow, magenta, blue three primary colors according to a certain proportion of overprint dot edition combination obtained different brightness achromatic (white, light gray, gray, dark gray, black), to obtain a neutral gray on the vision of color, a lot of influencing factors, the printing use the amount of ink, paper, full version of concentration, dot area, overprint and the screen line number, will have the very complicated influence on the gray balance, this is the biggest test of machine overprinter precision and operating personnel skill level.
The second printing in general full version of things, spot color full or larger, anti on black, the same mark, there are the same color, generally difficult to color with, easy to produce the color difference, the phantom of the opera, rubbed against dirty, scratching phenomenon.
Finally, more difficult is the four colour printing laminated leakage empty words. Multicolor too much very fine lines, very fine print through difficult printing machine, the gripper demanding. This is a common problem, so the prepress designers must be checked before publication output file within the black text, especially the small print, is not only the black plate, while in the other three color should not appear. If appear, quality products are printed will be greatly reduced, RGB to CMYK graphic drawing, black text will change as the four colour black. Unless otherwise specified, otherwise must be treated.
In summary print qualified must meet: A, overprinter accurate; two, ink evenly; three, dot is full; four, ink balance; five, printing non printing fault, such as rubbing against dirty, scratch, flower version, paste version; six, strictly faithful to the original. We must pursue print high-quality, in order to adapt to the increasing human aesthetic concept.
