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 214
city, and may therefore be regarded as typical. The tanks in which the calcined material is lixiviated are simple filtering boxes of 1-in. to 1 J in. pine, measuring 5 to 7 ft. long and 40 to b'O ins. wide. A large number of such boxes will be required, arranged in rows in a room with a cemented or… … so as to make a tight joint all round and prevent the escape of even the finest particles of colour. Close above the true bottom at one end of the box (at the lowest point of the slope) is a hole about \\ ins. wide for drawing off the filtered Glauber salt solutions into a vessel underneath. This…
Pigments · Coloring matter · Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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