Jacob Christoph Le Blon
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Jacob Christoph Le Blon, or Jakob Christoffel Le Blon, was a painter and engraver from Frankfurt who invented a halftone color printing system with three and four copper dyes using an RYB color model,
4-colour mezzotint of Louis XV by Le Blon, 1739
Separate prints of four plates: indigo, yellow, carmine, and bistre from a halftone color engraving by Jacob Christoph Le Blon (1738) after a painting by Hyacinthe Rigaud of Cardinal Fleury.
Finding the right shade of skin tone, test No. 6, Print by Le Bon
CMYK color model
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The CMYK color model is a subtractive color model used in color printing as well as describing the printing process. The abbreviation CMYK refers to the four color components used in printing: cyan, m
Early three-color process (1902)
Approximation using CMY colors