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He's got one minor thing wrong -- in CMYK, black isn't there to save money, it is because that in theory, CMY mixed will produce black, but in reality the ink's
by derekp7 14y ago
He's got one minor thing wrong -- in CMYK, black isn't there to save money, it is because that in theory, CMY mixed will produce black, but in reality the ink's aren't "pure" enough, so they end up being a muddy color. So the K is there to produce the darker blacks.
Also, a) Ink is translucent; light goes through the ink, reflects off the white paper, goes back through, and that affects the color change of the light. Therefore ink uses CMYK. Pigments in paint are opaque, so light reflects directly off them. In this mode, Red-Yellow-Blue-Black works. For monitors, light is emitted not reflected at all, so that is why they use RGB. Oh, and many colors can translate from one model to another, but not all of them. Some can only be expressed in RGB but not CMYK, others can only be made in RYB.
- praptak 14y agoTrue, and not even the K in CMYK is 100% black, hence the notion of "rich black", which is a collective name for colors produced when K is at maximum and yet other colors are added to the mix. It even has its own Wikipedia page: http://en.wikipedia.org/wiki/Rich_black http://en.wikipedia.org/wiki/Rich_black
- jonhendry 14y agoAnd when painting, you often don't want to use black, because it's too dark, but clearly it would be painful, and probably impossible, to try to obtain a rich, almost-black-red by mixing CYM paints. (But it's easy to get by mixing red and a dark navy blue.)