In the process of album printing, the most important link is the color matching of album printing. The accuracy of a printer's grasp of the color of a product is related to the quality of the product printed.
In the early manufacture, because RGB gamut space is larger than CMYK, it is always handled by RGB mode before it is transferred to the printed copy. Of course, it can also be handled by Lab mode, but it is generally accepted by RGB mode. Why stop such conversion? It is because RGB three colors belong to the three primary colors of light and match the color addition; while CMYK is the four primary colors of ink, match the color subtraction, in fact, black ink can not be considered the primary color, but it is commonly used to replace the mixing of other three colors. The most intuitive performance is the same image, CMYK mode is darker.
Distribution of ink is an important work in color printing process. How this work works is directly related to the quality of picture album printing. Because bright color, good brightness and accurate hue are the basic requirements of color printing products, in order to complete this requirement, it is necessary to distribute printing ink accurately. Therefore, operators should control the knowledge of color and inking technology.
Control the changing rule of three primary colors in order to complete the accurate ink distribution: any color can be mixed with different proportions of three primary colors. The change of color phase of ink is exactly the application of this rule. If the three primary colours are mixed equally, they can turn black (approximate). Tri-Primary Ink Mixing Equally and Participating in No-Primary Ink Mixing
With the same proportion of white ink, it can be blended with various colors of light gray ink.
If the three primary colour inks are mixed in various proportions, they can be divided into different colour phases or duplicate colours, but the colour phase tends to be larger in proportion. If the two primary inks are mixed equally, they can become standard inter-color. After mixing and distributing the two primary inks in different proportions, they can be matched into various inter-color phases, but their color phases tend to be larger in proportion. In addition, the color of any color ink becomes brighter when it participates in white ink. Conversely, the color of black ink becomes darker when it is used.
Analyzing the color phase of the original manuscript: Correct the bias by applying the complementary color theory, improve the effect of cutting ink. When receiving the printed color manuscript of the album, first of all, we should stop earnestly appreciating and analyzing the various colors in the original manuscript, and control a basic criterion, that is, the three primary colors are the basic colors of any ink distribution. Generally speaking, any complex color can be assigned except gold and silver color by applying the changing rule of the three primary colors. However, in the process of technological theory, it is not enough to distribute innumerable ink colours only by three primary colours.
In theory, the pigments used to make inks are not very standard, so there are certain differences in the color of each batch of inks. Therefore, in theoretical work, such as medium blue, dark blue, light blue, light blue, medium yellow, dark yellow, light yellow, golden, orange, deep red, light red, black, green and other inks should also be used in order to reach the required ink color. There are many kinds of ink, but in any case, except the three primary colors, other colors are used to supplement the lack of three primary colors. Any complex color always varies within the range of three primary colors. As long as this criterion is well controlled, ink adjustment will not be a problem. When the color analysis confirms the principal color and auxiliary color ink and proportion, the allocation can be discontinued. However, assuming that the assigned hues have a tendency, the complementary theory can be used to correct their hues.
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