Master the changes of the three primary colors and accurately match the ink
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Dispensing ink is an important task in the color printing process. How this work is done is directly related to the printing quality of the product. Because of the bright colors, good brightness and accurate hue, it is the basic requirement of color printing products. To achieve this requirement, we must first accurately match the printing ink. Therefore, the operator must master the color knowledge and the ink adjustment process.
1. Master the changing rules of the three primary colors in order to achieve accurate ink blending
We know that any color can be blended with different proportions of the three primary colors. The hue change of the ink is to use this law. If the three primary colors are mixed and blended, they can become black (approximate). The three primary color inks are mixed in equal amounts and added with different proportions of white ink to form a variety of shades of light gray ink.
If the three primary color inks are mixed in various proportions, they can be blended into a plurality of different hue of intermediate or complex colors, but the hue is biased toward a large proportion of the primary color hue. If the two primary colors are mixed in the same amount, they can become the standard color; after the two primary colors are mixed and mixed in different proportions, they can be matched into a variety of different hue, but the hue tends to a large proportion of the primary hue. In addition, in any color of ink, the color of the ink becomes brighter after adding white ink. Conversely, when a black ink is added, its hue becomes dark. The above-mentioned primary color inks are blended into various colors, which are derived from the subtractive color theory of the three primary colors.
2. Analyze the hue of the original, correct the color cast by the complementary color theory, and improve the ink adjustment effect. After receiving the printed color draft, firstly carefully evaluate and analyze the various colors in the original, and measure the hue of the ink to be adjusted. proportion. The analysis of color is to grasp the basic principle that the three primary colors are the basic colors for any ink color. In general, the application of the three primary colors of change law, in addition to gold and silver color, any complex color can be deployed. However, in the process of process practice, it is not enough to allocate a myriad of ink colors by only three primary colors of ink. Because, in fact, the pigments used to make inks are not very standard, and even the ink produced in each batch is inevitably subject to a certain degree of difference in color. Therefore, in the actual work, it should also use inks such as medium blue, dark blue, light blue, light blue, medium yellow, deep yellow, light yellow, golden red, orange red, deep red, light red, black, green, etc. To achieve the desired ink hue. There are many types of inks, but in any case, in addition to the three primary colors, other colors are used to supplement the deficiencies of the three primary colors. Any complex color always changes within the scope of the three primary colors. As long as you master this principle, it is not a problem to adjust the ink. When the color analysis determines the primary color and the secondary ink and the ratio, the matching can be performed. However, if the adjusted hue is deviated, the complementary color theory can be used to correct the hue. For example, if a hue is green, it can be corrected by adding a small amount of red ink. On the contrary, the red taste is too heavy to add blue ink to correct.
3. Mixing of color and complex color
The so-called inter-color is a mixture of two primary color inks. For example, the hue after red and yellow is orange; yellow and blue can get green; red and blue can turn purple. With two, you can mix a variety of colors. That is, the primary color peach red and yellow are mixed with 1:1 to obtain a large red phase; if mixed with 1:3, a deep yellow color can be obtained; if mixed with 3:1, a golden red phase can be obtained. If the primary color yellow and blue are mixed, the green color can be obtained; if it is mixed with 3:1, the green color can be obtained; if it is mixed with 4:1, the apple green can be obtained; if it is mixed with 1:3, the dark green color can be obtained. If the primary color peach red and blue are mixed in 1:3, dark blue purple can be obtained; if mixed with 3:1, the approximate green lotus color can be obtained. The complex color is derived from the mixing of three primary color inks. If they are mixed in different proportions, many types of complex colors can be obtained. For example, the original colors of peach red, yellow and blue can be blended to obtain an approximate black color; 2 parts of peach red and 1 part of yellow and blue can be mixed to obtain brownish red; 4 parts of pink and yellow and blue can be blended to obtain reddish brown. If pink and yellow are 1 part, blue 2 parts, can be blended with olive; 1 part of peach red and yellow, 4 parts of blue can be blended to obtain dark green and so on.
4. How to adjust the ink color
When formulating the ink, it is necessary to determine which kinds of inks should be used according to the hue analyzed by the original.