Brief description of embodiments of dyes by the figures, on the fiber, azo dyes

摘要

P process of production of dyes by creating, on the fiber, azo dyes are not water-soluble, according to the technique of the dyes to the glass. / p & & p & is impregnated with the first of all the fibrous material with a coupler in the alkaline bath and then by the treating with a bath containing the compound of the diazonium, this process is characterized in that the development bath contains a sorting or tetrapolyphosphate of the alkali metal and the ph of the development bath is greater than 4,5 before the coupling and less than 9 after the coupling. / p & & p & the dyes thus obtained are combined and very robust. / p