Paint & colour mixing : a practical handbook for painters, decorators, paint manufacturers, artists and all who have to mix colours, containing over 300 samples of actual oil and water-paints and water-colours of various colours, and upwards of 1,500 different colour mixtures, with fifteen coloured plates / by Arthur Seymour Jennings. (1926)
Jennings, Arthur Seymour, 1860-1928 · London : Trade Papers Publishing Co. ; New York : Spon & Chamberlain · leaf 47
INTRODUCTION. 35 with the pointer, the rolls are just touching but not frictioning hard. If the hand-wheels are turned in a —— ae Py: : - —-— a sm rd … right-hand direction, past the zero mark, the “ pressure ”” calibrations are brought to register with the pointers_in
Paint mixing · Pigments
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.