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Application of the benzidine colours in all branches of printing (1898)
Farbenfabriken Bayer Aktiengesellschaft · Elberfeld · leaf 32
16 Dyed with: 4°/0 Benzo Chrome Brown K;discharged with tin. … IS Dyed with : 5 •>/„ Benzo Purpurine 4 B ;discharged with tin. 19Textile fabrics · Dyes and dyeing
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