Jacob Christoph Le Blon

Jacob Christoph Le Blon, or Jakob Christoffel Le Blon, (2 May 1667 – 16 May 1741) was a painter and engraver from Frankfurt who invented a halftone color printing system with three and four copper dies using an RYB color model, which served as the foundation for the modern CMYK system. He used the mezzotint method to engrave three or four copper plates (one each per printing ink) to make prints of paintings and portraits with a wide range of colors.