Simulated process printing is an enhanced version of normal printing where you simulate the look of the true color. Thus, it is a four color printing process that uses opaque inks and certain color separation techniques specific to its application areas. A true four color process printing includes using CMYK to produce a photo-realistic image. Contrary to simulated process printing that includes six, eight, or more color separations. It is necessary to have a print color mixing machine, which c