RGB is a much larger color space than CMYK. The big question is, when do you make the conversion and why? You will then convert these images to the CMYK color space prior to handing off final art files to your offset print provider. If you are preparing art files for final offset or digital printing, you will normally scan images, or open scanned images in Photoshop, into the RGB color space. Additional black ink is then added to achieve a true black. In contrast, color on a printing press is created with ink (cyan-magenta-yellow-black, CMYK, or subtractive color), and the presence of equal amounts of CMY yields K (black, or, more precisely, a dirty brown). The presence of equal amounts of all colors creates white light. Following is an elaboration on this important topic.Ĭolor on the monitor is created with light (red-green-blue, RGB, or additive color). Several years ago I wrote a short PIE Quick Tips article describing the difference between RGB and CMYK color and noting that you must convert RGB images to CMYK images prior to submitting a job to your offset or digital print provider. When to Convert an Image from RGB to CMYK
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