Hummel, J. J. (John James), -1902 · London : Cassell & Company · leaf 203
187 IRON MORDANTS. Chap. XI.] which, of course, also removes the acid salt formed. The employment of water containing bicarbonate of lime is exceedingly advantageous for the washing, since it greatly facilitates the decomposition of the absorbed mordant. The boiling in soap solution is necessary to… … temperature employed, 100° C., is said to modify the pre- cipitated ferric oxide and render it less liable to dissolve in the successive iron baths. According to Moyret, no iron soap is precipitated on the silk in this operation. Previous impregnation of the silk with tannin matter does not tend to…
Dyes and dyeing
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