The process involves separating color from an image into four basic colors. They are named as CMYK (Cyan, Magenta, Yellow, and Black) color separation or process color printing.
Enhancing color precision, color smoothness and reducing graininess yields a better result. Overprinting halftone dots of these basic shades in multiple densities entail this technique.
How to print color separations in Photoshop?
To make countless color shades, the requirement is to print them separately one over the other. Therefore, a mixture of combinations produces vast spectrum of reproducible colors.
Consequently, several printing plates to be used to accomplish the whole process which will be made of each array of color. This sequentially requires separate negatives or positives.
The term color separation refers to both the process and the products of that process. The act can be accomplished photographically, electronically, or on the desktop.
Printing multi‐channel separation in image processing employs additional inks to improve the perceived image quality by reducing the graininess and augmenting the printer gamut.
It also requires a color separation that deals with the one‐to‐many mapping problem imposed when using more than three inks.
Application of S‐CIELAB allows mimicking a spatial LPF by assessing the graininess to human vision. By applying it to multiple samples to carry-out a non-isolated prediction, this quantifies the apparent graininess and include as a criterion in the color separation.