Color Reproduction in Printing

Quality assurance in printing aims to constant/fixed and correct/correct color reproduction/copying via whole in the printing process. For printing ink and color printing supplies, the most important parameter is film thickness ink, halftone value, color balance, ink installation and color series. 

Ink film thickness For technical reasons, the maximum ink film thickness is in offset printing is about 3.5 m. For coated paper and color process related to DIN 16 539 color location which should be achieved/obtained with an ink film thickness between 0.7 and 1.1 m. 

If lithography it doesn't fit / doesn't match, use printing ink that is not appropriate, however, this could happen that point of standardization on the chromatic diagram CIE not reached. Color distance reproduction also decreases if the saturation is not adequate. 

In white area picture shows how narrow the color gap with the ink is less in every three color processes. 

In terms of physics, the effect of the thickness of the ink film on the The view can be explained as follows.

Printing ink does not cover the paper; the ink is, somewhat, transparent. Light enters/penetrates the ink. 

In passing through ink, light facing pigment that absorbs into wavelength whichever is larger or smaller. The higher the pigment concentration and the film thickness The higher the ink/bigger, the more pigment is produced incorporated by the incident light and, as a result, more is absorbed. In the end, the ray of light reaches the surface (white) on the print and reflected supplies. On the way back to the light has to go through the ink film again and only after that he can captured/seen by the eye of the observer. 

The thick printing ink film absorbs more light and reflects less than the thin printing ink film; so that observers see darker, more saturated colors, hues. The part of the light that reaches the eye becomes suitable as basis for estimating/grading each color.