The blending of our 4 primary colors: Cyan, Magenta, Yellow and Black (CMYK) will create any color on the spectrum hence the term 4/4 referring to the four color process on both sides

The blending of our 4 primary colors: Cyan, Magenta, Yellow and Black will create any color on the spectrum hence the term 4/0 referring to the four color process on front only.

This is a Color Matching System where all users from all over the world can refer to the Pantone system to make sure colors match without every being in contact with each other. This method is ideal if you have an exact color that you like to match and it will hard to create by using the CMYK method.