Subtractive (colour) process


Method of reproducing colours in which white light passes successively through two or more images, each dyed in a colour which absorbs (subtracts) a region of the visible spectrum transmitted by the others.

The colour produced depends upon the quantity of light absorbed by each dye. The colour dyes — cyan, magenta and yellow — are used. These are often termed minus red, minus green and minus blue since they absorb the colours red, green and blue respectively.