The basic printing color is CMYK (cyan, magenta, yellow, black). Different colors are stacked according to different ink percentage, that is, color printing.Because most of the paper is white, the printed white represents "0" ink.

White ink is a special color for printing, so it needs to be treated additionally, so the cost is relatively high. It is usually used for transparent material stickers. Adding white ink under CMYK four-color ink can set off the color saturation.If there is no white ink, the pattern and text will be a little transparent, and the places where there is no printing will remain transparent.