Although the bulk of color printing is done with CMYK inks (see Three
Little Pig[ments], a very nice snack), the limitations of real-world
dyes and pigments mean that some colors just can't be printed. One
process is Hexachrome (TM), which uses supplementary orange and green
inks, as well as CMYK. Whether the Hexachrome C, M, and Y are the
same as others use, I don't know.
Another scheme, used by Epson, uses light cyan and light magenta, in
addition to CMYK. Have a good look at good demo. sample images from
six-color computer printers; they are likely to be quite impressive.
Nicholas Bodley |@| Waltham, Mass.
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