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Blue immedial colours (1906)

Leopold Cassella & Co., author · Frankfort o.M. : Leopold Cassella & Co, G.m.b.H. · leaf 114

An illustration from Blue immedial colours, 1906, leaf 114
Double Jigger for Immedial Colours built by C. H. Weissbach, Chemnitz (Saxony).

Dyes and dyeing

Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.

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