Colour and Methods of Colour Reproductions
A 1923 Blackie technical manual by physicist L. C. Martin and trade-press editor William Gamble, explaining colour theory and photomechanical colour printing to British printers, photographers and students. Plates include a continuous spectrum band, additive and subtractive mixing circles, and a cherry-branch subject broken into yellow, cyan and magenta separations beside the combined print — ready-made diagrams and process demonstrations.
