Application of dyestuffs to textiles, paper, leather and other materials (1920)
Matthews, J. Merritt (Joseph Merritt), 1874-1931 · New York, Wiley · leaf 406
th metallic salts inorder to furnish satisfactoryshades. It is supposed thatthey form real color-lakes withthe metallic compounds. TheMelanogen for black is dyedwithout the addition of sodiumsulphide, using a rather con-centrated bath with the additionof 2 to 5 per cent of soda ashand 4 ozs. of… … — o3 388 SULPHUR DYES after-treatment, as a rule, darkens the shade and dulls the color. Itis carried out in the same manner as for substantive dyes. An after-treatment with sodium acetate is also frequently given the sulphurcolors; this is especially so with the brown dj-es. It is for the…
Dyes and dyeing · Textile fabrics
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