
If the printers can send you a profile for their press, then that's the best one to convert to. This can be a confusing choice, and there is a lot of lore out there that's not correct. When you make a CMYK conversion from an RGB image, you need to decide which profile to convert to. We highly recommend Rick McCleary’s CMYK 2.0 as a good guide to this process, the Adobe white paper by Jeff Schewe as well as Digital Photography Best Practices and Workflow Handbook. Good RGB to CMYK conversion is both an art and a science, but it is not rocket science. Meanwhile, many graphic designers blithely push the “convert to profile” button without a second thought. Perhaps it’s because many of them remember back to the days of film, making color separations as an arcane process requiring $50,000 drum scanners and specialized RIP software. The majority of photographers shy away from providing CMYK files. Should photographers worry about converting to CMYK? Here's what an image looks like when it's shown in the individual colors. As a matter of fact the "K" in CMYK comes from the word "key", meaning that the cyan, magenta and yellow plates are "keyed" or matched up to the black plate.įigure 1 In CMYK color, each color is broken out into a channel that represents an ink color. Although theoretically all colors can be produced by cyan, magenta and yellow, printing inks are not totally pure in color and so a black plate is necessary to achieve a true black. It is a subtractive color model using cyan, magenta, yellow and black inks in color printing. CMYK color is also commonly referred to as process color. Cyan, Magenta, Yellow and Black are the colors used in the vast majority of commercial color printing – books, magazines, brochures and more.
