Hummel, J. J. (John James), -1902, Foster, A. R, Hasluck, Paul N. (Paul Nooncree), 1854-1931 · Philadelphia : David McKay · leaf 12
ING MATTERS FOR DYEING TEXTILES. Indigo Carmine blue, with regard to wool and silk dye- ing. Indeed, this colouring matter possesses certain advantages over the majority of blue colouring matters. It can be associated with other acid colouring matters, and it dyes very level shades. Its only… … Fig. 1. — Indigo Grinding Mill. it must be ground in the dry state, but for the indigo-vat it may be mixed with water, which considerably facilitates the grinding. The oldest form of grinding machine is the stamping mill, provided with an arrangement for passing the ground Indigo through fine…
Dyes and dyeing · Coloring matter
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
![An illustration from Novo teatro di machine et edificii per uarie et sicure operationi : co[n] le loro figure tagliate in rame é la dichiaratione, e dimostratione di ciascuna : opera necesaria ad architetti, e a quelli, ch[e] di tale studio si dilettano (1607)](https://img.insideoutlibrary.com/img/200/ia-novoteatrodimach00zonc-127-78.webp)
