"Hummel" Quotes from Famous Books
 ... French dyers thought that a mordant had the effect of opening the pores of the fibre, so that the dye could more easily enter; but according to Hummel, and later dyers, the action of the mordant is purely chemical; and he gives a definition of a mordant as "the body, whatever it may be, which is fixed on the fibre in combination with any given colouring matter." The mordant is first precipitated on to the fibre and combines with the ...
— Vegetable Dyes - Being a Book of Recipes and Other Information Useful to the Dyer • Ethel M. Mairet |
