Why do printers have CMYK ink instead of RYB & black ink?
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The red in your childhood paint has yellow in it. Red is not a primary color. You were lied to.
Cyan
Magenta
Yellow
blacK
These are the primary colors of applied art. Sometimes whites are used but that requires paint or a specific type of printer for anything offset. Substrate will affect color purity.
Red
Green
Blue
These are the primary colors of light. Red and green make yellow. All three make white. Their absence is black.
I work in art and product design. I’ve worked in print. I’ve been a computer user for 40 years.
Color is perception to an extent of course. The light will affect tone. Cool. Warm. Etc.
There’s other models. HSB (Hue Saturation Brightness) and proprietary shît like Pantone. Metallics use flake or fun glazes.
Paints historically have used pure pigments now chemical is cheaper. Traditional red hues use literal gold for instance.
Anyhow. It’s a whole world.
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