Many friends who don’t know much about UV printers, especially customers who are familiar with traditional printing methods such as silk screen printing and offset printing, do not understand the matching of the four primary colors of CMYK in UV printers. Some customers will also ask the question of why the display screen is three primary colors, and why UV ink is four primary colors.
Why are the inks of UV printers CMYK four primary colors?
In theory, UV printers only need three primary colors for color printing, namely cyan (C), magenta (M), and yellow (Y), which can already be combined into a color gamut, just like the RGB three primary colors of the display. However, due to the composition of UV ink in the production process, the purity of the color will be limited. The CMY three primary color ink can only produce a dark brown that is close to pure black, and black (K) needs to be added when printing. pure black.
Therefore, UV printers that use UV ink as printing consumables must add a black color on the basis of the theory of three primary colors. This is why UV printing adopts the CMYK model. In the UV printing industry, it is also called four colors. In addition, the six colors that are often heard in the market are the addition of Lc and Lm to the CMYK model. The addition of these two light-colored UV inks is to meet those scenes that have higher requirements for the color of the printed pattern, such as advertising display materials. print. The six-color model can make the printed pattern more saturated, with more natural transition and obvious layering. With the advancement of technology, 4 colors can also print 6 colors, which reduces LC and LM and saves costs.
In addition, with the market’s higher and higher requirements for the speed and printing effect of UV printers, some manufacturers have also introduced more color configurations and made some spot colors in addition to the six colors, but these are also inseparable from the same principle. The four-color and six-color models are the same.