Focoltone swatch book

Focoltone swatch book (In French nuancier Focoltone) system developed for color communication between design, medium preprint and print, consisting of 763 shades resulting from the mixture of the process colors CMYK from a screen value of 5% or more; a special feature is the illustration of the color difference Delta E during dot-size-dependent tonal value increase; Focoltone is also available in some DTP programs for newspaper printing and as a digital color fan.