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Application of the benzidine colours in all branches of printing (1898)
Farbenfabriken Bayer Aktiengesellschaft · Elberfeld · leaf 30
Dyed with : 8% Pinto Black B;discharged with tin. … Dyed with: 5% Diazo Blue (Beta-Naphtol);discharged with tin.Textile fabrics · Dyes and dyeing
Internet Archive · Clark Art Institute Library · Public Domain Mark 1.0. Free to use for anything.
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