Add CMYK Color Separation
CMYK stands for cyan, magenta, yellow, key (black). In the context of photo editors and graphics programs, it is a subtractive color model that is different from the commonly used, additive RGB color model. In simplified terms, RGB colors work by becoming lighter with the addition of white, while CMYK colors subtract the white by overlaying colors, eventually resulting in black; that black isn’t as deep as it should be for printing, so black is added to the CMYK mix.
Many users complain about GIMP’s lack of CMYK support. For many designers and photographers, images have to be converted to CMYK colors for high-quality prints. If you require CMYK separation, download the plug-in Separate+ from Yellowmagic. Save the ZIP file, extract the plug-in to the GIMP plug-in folder, then restart the program.
The new feature will be located in the Image menu.