Beech, Franklin · London : Scott, Greenwood ; New York : D. Van Nostrand · leaf 22
and so make it feel harsher. Strong acids have a disintegrating action on the wool fibre. There is a very considerable difference between the action of acids on wool and on cotton, and this difference of action is taken advantage of in the woollen industry to separate cotton from wool by the… … Fig. 5. — Wool Fibre Heated with Acid. form of a powder, while the wool is not affected, sulphuric acid is used very largely in dyeing wool with the acid- and azo-colouring matters. Nitric acid affects wool in a very similar manner to the acids named above when used in a dilute form ; if strong it…
Dyes and dyeing
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