Normal color printing is four-color printing (that is, four kinds of CMYK inks). These four colors can be mixed into daily colors. However, in some cases, there will be colors that are difficult to mix, such as colors that are prone to color deviation, so the ink should be adjusted in advance before printing, or special inks such as gold, silver and fluorescent colors need to be printed in a fifth color. I don't know if I made it clear. Xinrui Printing is engaged in professional printing 65438+.