The Katigen colours of the Farbenfabriken vorm. Friedr. Bayer & Co., Elberfeld : and their application in the various branches of the textile industries (1902)
Farbenfabriken vorm. Friedrich Bayer & Co · Elberfeld : Farbenfabriken vorm. Friedr. Bayer & Co. · leaf 22
Katigen Blue Black B. The chief value of this brand is in its direct dyed shade, which is of a bloomy bluish black tone, and which by oxidation in the air becomes bluer and brighter; the after-treatment with metallic salts has no particular effect. Properties and application of Katigen Blue Black B… … Katigen Blue Black R. Dyed direct it produces a deep blue black shade, which when treated with metallic salts or aged (steamed) assumes a bloomy violet black or black blue. Properties and applications: same as the SW brand. It is especially suited for darkening the shades of Katigen Indigo B and R…
Farbenfabriken vorm. Friedrich Bayer & Co. · Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
