lift-up flaps book has half of the four-color printing and spot color printing, which should be combined with the color of the previous design to the machine printing, in the lift-up flaps book rarely use so many complex processes, but each enterprise needs different products. For the degree of prominence of the product to choose the process that needs to be made, then for the printing plant, we must have a difference for all the printing colors, what color should be printed on the machine, how to deal with the difference between spot colors and printed colors.

When the Internet was not so developed in the past, it was basically the traditional way and the way of the exhibition, so every few quarters of the year, some enterprises to participate in the exhibition have customized some albums for their own enterprises to facilitate the introduction of their products at the exhibition, and each product corresponds to the content of the album. In this case, even if the customer's time is tight, you can attach a lift-up flaps book of your own enterprise, the printing quality of the album can not be too bad, the interpretation of the picture text typeset should be reasonable at a glance, then in the process we have to distinguish the two colors:

Spot color treatment of the pre-press lift-up flaps book

Spot color (printing) refers to the printing process of using other colors than yellow, magenta, cyan and black ink to reproduce the color of the original manuscript. In packaging printing, spot color printing process is often used to print a large area of background color.

In lift-up flaps books and packaging printing, the cover often consists of uniform blocks of different colors or regular gradients and text, which can be overprinted with four primary inks after color separation, or special inks can be blended, and then only a specific ink is printed on a uniform block or a product. In some cases, in order to consider improving the printing quality and saving the number of overprints, sometimes choose to use spot color printing, then in the system matching of spot color printing, there are many colors that have exceeded the printing four-color domain, and can not be reproduced with four-color ink, and the CMYK combination value provided by the system is also an approximation.

Therefore, if the lift-up flaps book selects the colors in the spot color system, and uses the printed four-color separation output or references the spot color to approximate the corresponding SMYK combination values in the system, and uses these values to replace the original spot color with the printed four colors, then the result is definitely causing spot color distortion.

Printing color treatment of the lift-up flaps book

Printing color is a color composed of different percentages of C, M, Y, K, so it is more reasonable to call it a mixed color. C, M, Y, K, is usually used in the printing of the four primary colors, C represents cyan, M represents flat red (also known as magenta), Y represents yellow, K represents black. Because in the actual reference, cyan, magenta and yellow are difficult to superimpose to form a true black, but only brown. Hence the introduction of K- black.

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