Hummel, J. J. (John James), d. 1902 · London : Cassell · leaf 310
the blue part of compound shades, e.g., browns,drabs, itc. The. same may be said of Indigo Extractor Indigo Carmine blue, with regard to wool and silkdyeing. Indeed, this colouring matter possesses c^iiainadvantages over the majority of blue colouring mattere.It can be associated with other acid… … Fig. 81.—Indigo Grinding Mill. thoroughly well ground. When required for making In-digo Carmine it must be ground in the dry state, but forthe indigo-vat it may be mixed with water, by whichmeans the grinding is considerably facilitated. The oldest form of giinding machine is the stampingmill,…
Dyes and dyeing
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