What does 4+ 1 printing machine mean?

4+ 1 means four colors of CMYK plus another spot color. According to relevant public information, the second category is classified by color number, including monochrome machine, two-color machine, four-color machine, 4+ 1 color and 4+ color. Four colors are what we call four colors, and C, M, Y, K, 4+ 1 is the four colors of CMYK plus another spot color, such as gold and gold.