1. Deep basic primary colors. 1) Make full use of various solid color blocks such as RGB and logos, as well as deep basic colors that do not require layers. Generally, customers require strong and bright colors for these header words and logo patterns. In theory, it is to give full play to the maximum solid density of offset ink and achieve maximum saturation. Although 95% of the dots will increase to 100% after printing, this is different from the effect of 100% solid printing. 95% of the dots only have 95% of the dot density reaching the solid, while the increased 5% area has ink, but the ink density is thin. When 95% of the dots increase to 100%, the ink density is not as thick and bright as 100% of the solid density. 2) Landscape photography images with colors such as blue sky, ocean, green leaves, and lawns, because in people's minds. Fixed concepts have been formed. Therefore, in principle, the color volume of the C version should be deepened on the basis of the color volume required for the hue, while the green of green leaves, lawns, etc. is the Y version, making the green saturated and bright. For the red, green and blue basic colors that need to be layered, according to the color deviation and gray characteristics of general offset printing inks, the optimal saturation configuration is: red = M95% + Y85% green = Y95% + C85% blue = C95% + M80% 3) Blue sky dot value configuration characteristics: First, do not put Y color below 40% of the C plate to make the blue sky brighter; second, put some Y color above 50% of the C plate to keep the blue sky from turning red and make the blue calm and thick. At the same time, since the sky blue ink is red, the light red is consciously reduced to make the blue sky more beautiful. 4) The red leaves of Xiangshan in autumn are redder than the actual red leaves. The depth basic color Y is 100%: M is 95%, and C is not put, making the red leaves look particularly gorgeous in the sun, giving people a pleasant sense of transparency. This change in the pursuit of color breaks through the traditional color matching method and highlights the aesthetic value of color in visual art. 2. The depth basic color maintains the level. 1) The gradation value range of the depth basic color dot is 65% and 190%. Since the dots above 80% increase more, the levels are easy to be parallel. Therefore, the basic colors of the levels are needed in this area. Under the premise of emphasizing sufficient field density, the levels should be maintained, rather than emphasizing the saturation of the field density, which leads to the paralleling of the basic colors. Processing points: concentrate the basic colors of the required depth of the level on the color volume of the area above 80% to moderately reduce the lightness and keep it away from the field color block, so that the printing can print the field density and maintain the level. 2) In the process of color processing, it is difficult to take into account the brightness and saturation of the color and the brightness and darkness in the color. In order to maintain the brightness and darkness in the color, it is necessary to use complementary colors. If Shenzhen packaging printing uses complementary colors, the brightness of the color will decrease and the grayscale will increase. If you want to make the color bright, you should put less complementary colors, so that the brightness and darkness levels in the color will be affected. For timeliness and packaging products, the saturation and brightness of the color should be emphasized, affecting the brightness and darkness levels of some colors. In this way, the final printed image has a strong sense of color and good visual effects. The key is to master a degree 3) Depth The layered texture in the basic color is mainly manifested in the main color version, such as red, orange and other warm colors: manifested as Y and M versions; such as green, cyan and other cold colors, manifested as C version. Therefore, we must emphasize the layered texture of the main color version to vividly display the characteristics of physical layering. 4) The basic color of the mid-tone area is sufficient. The gradation value range of the mid-tone area dots is 35% and 165%. It is the main part of most objects and the key area for color processing. To adjust the basic hue of this area to the best saturation, the key is to deepen the hue by about 5% based on the amount of color required, such as red flowers. The bright mid-tone M color requires 40% of the color, which can be deepened by 45% to make the red more saturated and bright.