Hydron blue pat. and hydron violet pat. printed on cotton (1900)
Cassella Color Company · New York : Cassella Color Co. · leaf 24
liydron Colours on Cotton Yarn (Self Shades) Hydron Violet R pat. Hydron Yellow G pat. 45 46 6% Hydron Yellow G pat. Paste 20°/.. … 48 16 Wo Hydron Yellow G pat. Paste 20°/o 16 Wo H CASSELLA COLOR COMPANY, NEW YORK.
Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
