1 overall color correction, the original correctly selected set point with the white / black white original correct field, select the set point is to reproduce the original black color, the level of the key color card printing, are effectively color, level adjusted basis. Maximum density correct white point, black point and set the election according to the characteristics of various types of originals and printability conditions, make full use of whiteness of the paper and four-color ink superposition, to achieve the best visual contrast effect. Because printing photographic original is a contrast compression process, therefore, the choice of site and set the white field to take advantage of whiteness Dongguan tag color card printing paper, taking into account the level of high-profile good; the choice of site and set to black dark tone images full performance level to meet the visual habits and psychological requirements. Setting the white / black as far as possible to extend the original tone body color card printing plant in Dongguan, increase the contrast intensity. Ink does not light discoloration and fading ink reason in sunlight exposure, it will be different degrees of color and brightness changes, the absolute light without changing the color of the ink is not, in strong sunlight effect, all ink colors It will have varying degrees of change. This change can be divided into two types. 1. Fading: In the role of solar ultraviolet ink poor light, lost its bright color Dongguan product packaging color card printing, color becomes lighter gray. Especially in light color and four-color ink printing when registering yellow and red two colors fade faster than blue and ink fade slowly. 2. color: black ink and print fade contrary, under the effect of daylight color change was darker, and the color is changed, people called this change color. Dongguan plastic color card printing, color card printing, printing plant in Dongguan, Dongguan City, often beyond the packaging products factory provided. Dongguan Chang-ping beyond packaging products plant (www.dgcyp.com) strong, credible, in Dongguan, Guangdong paper printing industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead beyond printers and you hand into the brilliant, for a better future!