A treatise on colour manufacture : a guide to the preparation, examination, and application of all the pigment colours in practical use (1908)
Zerr, Georg, Rübencamp, R. (Robert), Mayer, Charles · London : C. Griffin · leaf 430
bles are placed side by side in vertical rows, but are not packed too tightly. The charging hole is then closed, and the furnace heated slowly, so as to raise the charge to a dark red heat in about twenty hours. The distillation products escape through the leaks in the covers, and are partly… … the furnace afterwards allowed to cool down slowly, with exclusion of air, by closing all the openings and fire-doors. All freshly calcined charcoal is liable to ignite spontaneously if exposed to the air immediately after calcination in hermetically closed vessels — i.e., it is pyrophoric. The…
Pigments · Coloring matter · Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
