Early representation of the three-color process (1902).

CMYK printing was first used in 1906, when the Eagle Printing Ink Company demonstrated that the colors cyan, magenta, yellow and black (key) could be layered over a white substrate to produce a practically unlimited range of colors.​6​

The rasters of the varying colours are tilted to reproduce a full colour effect.

https://en.wikipedia.org/wiki/CMYK_color_model
https://cmykhistory.com/thomas-a-lenci-and-the-eagle-printing-ink-company/#:~:text=(CMYK%2C%20by%20the%20way%2C,%E2%80%94also%20known%20as%20black.)&text=CMYK%20printing%20was%20first%20used,practically%20unlimited%20range%20of%20colors.

Kylièn Bergh
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