Naphtol AS auf Baumwollgarn = Naphtol AS on cotton yarn = Naphtol AS sur filés de coton
A dye sample book issued by the I.G. Farbenindustrie company in Frankfurt am Main in 1900, presenting Naphtol AS dyes on cotton yarn for textile dyers and chemists. Its pictures are vertical strips of dyed yarn swatches in red, magenta, purple, and brown shades, with figures beside them giving dye quantities; a designer might draw on the tonal range of these dull plum and rust colours.
