Painters' oils, colours, and varnishes : with numerous engravings and diagrams (1905)
Hasluck, Paul N. (Paul Nooncree), 1854-1931 · Philadelphia : David McKay · leaf 74
hrome colour, the two tubs A and B are partly filled with water ; a weighed amount of bichromate of potash is placed in one tub, and an equivalent amount of acetate of lead in the other. Steam is now turned into both tubs until the salts are dissolved, when it is shut off, and the liquids are… … Fig. 31.—Precipitating Plant Fig. 32.—Cloth Filter. out, leaving the supernatant (or floating) liquid clear. The clear liquid is syphoned off and fresh water added, the pigment stirred up and allowed to settle—this treatment being several times repeated for the purpose of removing all the soluble…
Paint · Varnish and varnishing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
