2. Print
Presses (printing machines) print only one color at a time. So there are monochrome and polychrome presses.
2.1 Color printing
While a photograph presents a full range of shades and colors, printing processes generally use four colors to reproduce the color spectrum (CMYK), commonly referred to as "four-color process".
Subtractive synthesis: CMYK (cyan, magenta, yellow, black) is therefore a possibility we have for rendering (industrially reproducing) images with printing inks.
The offset process, for example, often uses this (subtractive) synthesis to reproduce the color spectrum.
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