Das Färben der Wolle : einschliesslich des Woll-Drucks mit den Farbstoffen
A German trade manual from 1905 on dyeing wool, published in Frankfurt am Main by the dye manufacturer Leopold Cassella & Co for dyers and textile works. Its pictures are dye swatch plates with dense black samples at different percentages, plus a factory view of the company's riverside plant, useful to a designer wanting a clean printed-sample layout or an industrial panorama.
