Processing method of color saturation of printed products

1. The depth of the basic primary colors do enough

1) Make all kinds of solid color blocks, such as red, green, blue and other color header words and signs and other patterns and basic colors that do not require layers of depth. Generally, customers require strong and bright colors for these header words and signs. Theoretically, it is to give full play to the maximum field density of offset printing ink to achieve maximum saturation. Although 95% of the dots will increase to 100 after printing, this is different from the effect produced by 100 of the field printing. 95% of the dots only reach the field density in 95% of the dot area, while the increased 5% area has ink, but the ink density is relatively thin. An ink density with a dot gain of 95% to 100 is not as thick and bright as a solid density of 100.

2) The blue sky, ocean, green leaves, lawn and other colors in landscape photography images have formed fixed concepts in people's minds. Therefore, in principle, the color quantity of version C should be deepened on the basis of the color quantity required for this hue, while green leaves, lawn and other green colors, so should version Y, making the green saturated and bright. For the basic colors of red, green and blue with required depth, according to the color cast and gray characteristics of general offset printing ink, the optimal saturation configuration is: red = M95%+ Y85% green = Y95%+ C85% blue = C95%+ M80%

3) The network value configuration characteristics of the blue sky: First, Y color is not put below 40% of the C color version to make the sky brighter and brighter; The second is to put some Y colors above 50% of the C color version to make the sky blue not red, but also to make the blue calm and thick. At the same time, because the sky blue ink used now is reddish, it consciously reduces the light red, thus making the blue sky more beautiful.

4) The red leaves of Xiangshan Mountain in autumn can be treated redder than the actual red leaves. The basic depth color Y is 100: M is 95%, and C is not allowed to be released, making the red leaves especially gorgeous under sunlight, giving people a pleasant transparency. The above 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 of the basic color to maintain the level

1) The dot gradation value of depth basic color ranges from 65% to 90%. As more than 80% of the dots increase more, the levels are easy to merge. Therefore, a hierarchy of basic colors is needed for this area. The level should be maintained on the premise that the density of the field is sufficient, and the saturation of the density of the field should not be emphasized, resulting in the level of the basic color. Processing essentials: the depth of the basic color needs to be leveled, with the emphasis on the color quantity in more than 80% of the area to be moderately shallower, so that it can be separated from the solid color block, so that the printing can not only print the solid density, but also maintain the level.

2) In color processing, it is difficult to give consideration to both the bright saturation of colors and the light and dark levels in colors. To preserve the light and dark levels in colors, complementary colors must be used. Shenzhen packaging and printing use complementary colors, and the vividness of colors will decrease and the gray scale will increase. If you want to make the color bright, you should put less complementary colors, so that the light and dark levels in the color will be affected. For timeliness and packaging products, it should be emphasized that the saturation of colors is mainly bright, affecting the light and dark levels of some colors. In this way, the color sense of the final printed image is strong and the visual effect is good. The key is to master a "degree", and the grasp of "degree" is the performance of the operator's aesthetic level, which is directly related to the color art effect.

3) The hierarchical texture in the depth basic color is mainly expressed by the main color version, such as warm colors such as red and orange: it is expressed by the Y and M color version; Cold tones such as green and cyan are expressed by the C color version. Therefore, it is necessary to emphasize the hierarchical texture of the main color version and realistically show the characteristics of the physical hierarchy.

4) The basic color of the middle tone area is sufficient. The dot gradation value range of the middle tone area is 35%-65%, which is the main part of most images and the key area of color processing. To adjust the basic color of this area to the best saturation, the essentials are based on the amount of color required for this hue. Deepen by about 5%, such as safflower, its bright medium-tone M color requires 40% of the color, which can be deepened to 45% to make red more saturated and bright.