Allocation of printing ink in the most popular col

Deployment of printing ink in color printing process

deployment of 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. To achieve this requirement, we must first accurately allocate printing inks. Therefore, operators should master color knowledge and inking technology

1. Master the change law of the three primary colors in order to achieve accurate ink allocation. We know that any color can be mixed and adjusted by using different proportions of the three primary colors. It is this law that changes the hue of the ink. For example, the three primary color inks can turn black (approximate) after equal mixing and blending. Three primary color inks are mixed in equal amounts and different proportions of white ink are added to form light gray inks with different tones. If the three primary color inks are mixed according to various proportions, they can be mixed into a variety of intermediate colors or multicolor with different hues, but their hues prefer the primary color hue with a large proportion. If the two primary color inks are mixed equally, they can become standard intermediate colors; After mixing the two primary color inks in different proportions, they can be matched into a variety of intermediate colors with different hues, but their hues tend to be primary colors with large proportions. In addition, any color of ink, after adding white ink, its hue will appear brighter. On the contrary, after adding black ink, its hue becomes dark. The above formulation of primary color inks into various colors is based on the subtraction theory of three primary colors

2. Analyze the hue of the original, use the complementary color theory to correct the color deviation and improve the inking effect. When receiving the printed color manuscript, first of all, carefully appreciate and analyze the colors in the original, and think about the proportion of the ink hue to be adjusted. Analyzing the color manuscript is to 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 the three primary colors, any complex color can be mixed out except gold and silver color. However, in the process of process practice, it is not enough to only rely on the three primary colors to mix countless ink colors. Because, in fact, the pigments used to make ink are not very standard, and even there are certain differences 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, green and so on, so as to achieve the required ink hue. There are many kinds of inks, but in any case, except for 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, inking will not be a problem. When the color analysis determines the main color and auxiliary color ink and proportion, it can be mixed. However, if there is a deviation in the hue prepared, the hue can be corrected by the complementary color theory. For example, a certain hue is too green, which can be corrected by adding a small amount of red ink. On the contrary, if the red taste is too heavy, blue ink can be added to correct it

3. The blending of intermediate color and multicolor. The so-called intermediate color is the blending of two primary color inks. For example, the hue of red plus yellow is orange; Yellow plus 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 colors of peach red and yellow are mixed with 1:1 to obtain a 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. Multicolor is derived from the blending of three primary inks. If they are mixed in different proportions, it saves time to get many kinds of multicolor. For example, the primary colors of peach red, yellow and blue can be mixed in equal quantities to obtain approximate black; According to the technical requirements specified in the national standards, the tension, pressure, displacement, stiffness and other strength experiments and analysis of precision springs such as tension spring, compression spring, disc spring, tower spring, leaf spring, snap spring, leaf spring, composite spring, gas spring, mold spring, anisotropic spring and so on can get brownish red; Red Brown can be obtained by mixing 4 portions of peach red with 1 portion of yellow and 1 portion of blue; If 1 part of pink, 1 part of yellow and 2 parts of blue, olive color can be mixed; One part of pink, one part of yellow and four parts of blue can be mixed to obtain dark green and so on

4. Operation method of mixing ink when mixing ink, it is necessary to determine which kinds of ink should be used according to the hue of the original. For example, to adjust lake blue ink, it can be made 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 to be darker, add a little magenta. If you want to adjust the olive yellow green ink color, you can confirm that it is mainly white ink, add light yellow and Malachite blue, and slightly add pink. As long as the main color is determined, other colors are auxiliary colors, which should be gradually added in small amounts 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 ink layer printed, that is, compare it with the original to see whether it is appropriate. When comparing the sample, it is necessary to scrape the thin and light parts of the ink layer on the paper to see more accurately. There is also a principle to master when adjusting ink, that is, try to use less ink of different colors, that is, if you can use two kinds of ink, don't 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 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 samples is adjusted, they can be adjusted in batches according to their respective ink proportion, so as to ensure the ink quality and improve the work efficiency. This is due to: 1) efficiency