Hummel, J. J. (John James), d. 1902 · London : Cassell · leaf 498
ot be for-gotten that a dyer knows buthalf his business if he is simplyacquainted with these conditions.He must not only learn how bestto apply any given colour: hemust also know the capabilities of each dyed colour :how it withstands the action of lio^bt, milliner, scourincj.(tc,—in short, all… … ^ Uhap. XXIV.] FASTNESS OF DYED COLOURS. 485 influences just mentioned, and, as already stated, all caremust Le taken to avoid the possibility of referring anyeffect produced to more than one cause at a time. Suchexposed patterns must be afterwards carefully comparedwith the original patterns as…
Dyes and dyeing
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