Sometimes the regulations are destined to be broken. E.g, Newcomers to printing know Offset printing is based on the principle of “water and ink incompatibilityâ€. After they became veterans, they learned that in order to make the offset press work properly, emulsification of the ink is necessary. After all, water and ink should be mixed.
Printers know that in the process of copying color images, CMY is the primary color of the color, and CMYK four-color ink is the most commonly used primary ink. In order to challenge this rule, the author asks the question: "Can I print color images without CMYK ink?"
Figure 1 is a color image printed with non-CMYK ink. Observe the image and you will see a person in white dress riding on the leading camel through the desolate desert. Everything is normal. Figure 2 shows the Figure 1 Color separation , red ink (top right), green ink (bottom right), blue ink (bottom left), and color composite image (top left). How is this done?
Implementation ideas
The use of non-color material three primary color inks for color image reproduction should follow the steps of color image three primary color image reproduction: color printer characterization, color conversion, color printing.
The characterization of a color press defines the relationship between device color information and CIE LAB chromaticity values. Usually, for non-CMYK When characterization of a printing device is not based on achieving maximum color gamut, it is more focused on color description.
In the color conversion phase, the image is color converted from the RGB color space to the printer color space via an API (Application Programming Interface).
In the color printing stage, after the image is color managed, it is printed with a characterized printer.
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