Union shades dyed in slightly acid bath : British patent no. 270⁰⁹ (1900)
Cassella Color Company · New York : Cassella Color Company · leaf 19
CREPONS DYED IN A SLIGHTLY ACID BATH. … 1,1 % Diamineral Blue 3B pat. 0,25% Naphtol Blue Black 0,1 % Formyl Blue B 0,1 % Union Fast Orange R pat. 1 % Union Fast Orange G pat. 2 % Diamine Brown M 1,5 % Diamineral Blue 3B pat. 0,25% Naphtol Blue Black. CASSELLA COLOR COMPANY, NEW YORK.
Leopold Cassella & Co · Dyes and dyeing · Color in the textile industries
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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