Plastic packaging printing color processing method

It is very important to grasp the method and method of color processing.

(1) Treatment of color saturation

How to match the saturation is an important part of color processing, because customers all require that their products are saturated and bright, and sometimes the requirements are very harsh. In fact, compression processing may be a variety of colors or the same amount on the basis of loss on a certain portion of the color separations to enhance the color of the other part, and sometimes all of the color saturation balance, it should be decided according to the content of the original colors and body And master the following essentials:

Depth basic colors

Various solid color blocks such as red, green, blue and other solid characters, logos and other patterns and depth basic colors that do not require layers are sufficient. The general customers require these logo colors to be thick, thick and bright. Therefore, to use 100%, it is necessary to use 100% solid ground to fully utilize the maximum solid density of gravure ink. It cannot be 90% or 95%, although 90% and 95% of the dots are expanded by 100 after printing . %, But this is different from the effect of 100% solid printing. 90% of the dots only reach the solid density in the 90% of the dot area, while the enlarged 5% or 10% area has ink, but the ink is more Thin, the density can not achieve the effect of solid density, so from a visual point of view, the ink density of 90% or 95% of the dots expanded to 100% is not as thick and bright as the solid density of 100%.

Maintain the gradation in the basic color of depth

1. The range of the dots of the depth basic color is 65% -90%, and more than 80% is the area where the gravure dots expand the most, which is easy to cause gradation and gradation.

2. For the basic colors that need gradation in this area, under the premise of emphasizing the saturation of the solid color block, pay attention to maintaining the gradation in the basic color of the depth. When grading and grading, we can not pay attention to the gradation in the basic color of the depth, which affects the lack of drinking and degree. The processing method is to lighten the basic colors of the required depth moderately, so as to distance them from the density on the ground, so as to achieve the best of both worlds.

Need to pay attention to the best saturation configuration of red, green and blue. According to the characteristics of gravure printing and surface printing ink, the optimal saturation configuration of red, green and blue is: red = M95% + Y80%; green = Y95% + C80%; blue = C90% + M75% .