Blending ink is an important work in color printing process. How well this work is done is directly related to the printing quality of products. Because bright colors, good brightness and accurate hue are the basic requirements of color printing products. In order to achieve this requirement, we must first accurately allocate printing ink. Therefore, operators should master color knowledge and inking technology.

Master the change law of the three primary colors in order to achieve accurate ink allocation: any color can be mixed and adjusted by using different proportions of the three primary colors. It is this law that is used for the hue change of the ink. If the three primary color inks are mixed in equal amount, they can turn black (approximate). Different shades of gray ink can be mixed into different proportions.

If the three primary color inks are mixed according to various proportions, they can be mixed into a variety of intermediate colors or multi colors with different hues, but their hues tend to the primary colors with a large proportion. If the two primary color inks are mixed in equal amount, they can become standard intermediate colors; After the two primary color inks are mixed in different proportions, they can be matched into a variety of intermediate colors with different hues, but their hues tend to the primary color hue with a large proportion. In addition, in any color of ink, the hue becomes brighter after adding white ink.

Analyze the hue of the original: use the complementary color theory to correct the color deviation and improve the ink blending effect. After receiving the printed color manuscript, first carefully appreciate and analyze the various colors in the original, and master a basic principle, that is, the three primary colors are the basic colors for blending any ink color. Generally speaking, applying the change law of three primary colors, any complex color can be mixed except gold and silver color. However, in the process of process practice, it is not enough to deploy countless ink colors only by three primary colors of ink. Because, in fact, the pigment for manufacturing ink is not very standard, and even there is a certain degree of difference in the color of each batch of ink. Therefore, in practical work, we should also add an appropriate amount of inks such as medium blue, dark blue, light blue, light blue, medium yellow, dark yellow, light yellow, golden red, orange red, dark red, light red, black and green to achieve the required ink hue. There are many kinds of inks, but in any case, in addition to the three primary colors, other colors are used to supplement the shortcomings of the three primary colors. Any complex color always changes within the range of three primary colors. As long as you master this principle, ink mixing will not be a problem. When the main color and auxiliary color ink and their proportion are determined by color analysis, they can be mixed. However, if there is a deviation in the hue, the hue can be corrected by the complementary color theory.

Intercolor and multicolor blending: the so-called intercolor is the blending of two primary color inks. For example, the hue of red plus yellow is orange; Yellow and blue can get green; Red and blue can turn purple. With two matching, many kinds of intermediate colors can be mixed. That is: the primary color peach red and yellow are mixed with 1:1 to obtain the bright red phase; If mixed with 1:3, dark yellow can be obtained; If mixed with 3:1, the golden red phase can be obtained. If the primary color yellow and blue are mixed equally, green can be obtained; If mixed with 3:1, you can get emerald green; If mixed with 4:1, apple green can be obtained; If mixed with 1:3, dark green can be obtained. If the primary colors of peach red and blue are mixed with 1:3, dark blue and purple can be obtained; If mixed with 3:1, the approximate Green Lotus color can be obtained. The multicolor comes from the mixing of three primary inks. If they are mixed in different proportions, many kinds of multicolor can be obtained. For example, the primary colors of peach, yellow and blue can be mixed in equal quantities to obtain approximate black; Brown red can be obtained by mixing 2 parts of peach red with 1 part of yellow and 1 part of blue; Red Brown can be obtained by mixing 4 parts of peach red with one part of yellow and one part of blue; If 1 part of peach red and 1 part of yellow and 2 parts of blue, olive color can be prepared; 1 part of peach red, 1 part of yellow and 4 parts of blue can be mixed to obtain dark green, etc.

Operation method of mixing ink color: when mixing ink, determine which kinds of ink should be used according to the hue analyzed by the original. For example, to adjust lake blue ink, it can be prepared by visual inspection and practical experience. White ink is the main color and Malachite blue is the auxiliary color, which should be slightly added. If you want deeper, add a little magenta. If you want to adjust the olive yellow green ink color, you can determine that it is mainly white ink, add light yellow and Malachite blue and slightly peach red. As long as the main color is determined, other colors are auxiliary colors, which should be added gradually and stirred evenly. Then, use two pieces of paper (the same as the printing paper), one of which is coated with a little adjusted ink, and use the other piece of paper to scrape it to the thickness of the printing ink layer, that is, compare it with the original to see whether it is appropriate. When comparing the sample draft, you should look at the relatively thin and light parts of the ink layer of the paper scraping sample in order to see it more accurately. When adjusting ink, we should also master a principle, that is, try to use less ink of different colors, that is, if we can use two kinds of ink, we should not use three kinds of ink to adjust, so as not to reduce the gloss of the ink On the other hand, the ink color of the scraping sample should be slightly darker than the primary color, so that the printed color sample can be accurate. After the ink color of the small sample is aligned, the batch ink can be adjusted according to their respective ink proportion, so as to ensure the ink quality and improve the work efficiency.

To sum up, as long as we master the change law of the three primary colors, apply the color knowledge, seriously practice, analyze and summarize, we will be able to quickly and accurately deploy color inks with excellent phase accuracy, bright color, brightness and good printability, so as to lay a solid foundation for improving product quality.