Visual color matches

In many companies, an extremely simple way to control color is still being used, which consists in seeking the best visual match among a set of printed colored samples. The use of such color atlases has two important drawbacks: 1) it is not easy to guarantee that the different editions of the same atlas will be perfectly identical; 2) the colored samples have to be compared with a perfectly well-defined illuminant, since metamerism depends on the spectral composition of the light source.

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