Hummel, J. J. (John James), d. 1902 · London : Cassell · leaf 201
w Chap. XI.] IRON MORDANTS. 187 M hicli, of course, also removes the acid salt formed. Theemployment of water containing bicarbonate of hme isexceedingly advantageous for the washing, since itgreatly facilitates the decomposition of the absorbed mordant. The boiling in soap solution is necessary to… … Fig. 46.- Squeezing Machine used in the Mordanting of Silk. temperature employed, 100° C, is said to modify the pre-cipitated ferric oxide and render it less liable to dissolvein the successive iron baths. According to jMoyret, no iron soap is precipitated onthe silk in this operation. Previous…
Dyes and dyeing
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