Diamine colours coupled with nitrazol C on cotton yarn
A 1900 dye sample card published in New York by the Cassella Color Company, a dye maker, for textile dyers and colourists testing diamine colours on cotton yarn. The pictures show six vertical strips of skeined yarn dyed in shades running from yellow and orange through red to brown and black, mounted on cream cards with tiny printed labels; a designer could take from them a graded palette of warm earth tones and the way a single dye family shifts in value.
