COMPOSITION FOR KERATIN FIBERS COLORING CONTAINING N-SUBSTITUTED DERIVATIVES OF 4-OXYINDOLE, NEW DERIVATIVES, METHOD OF THEIR PREPARATION, THEIR APPLICATION FOR COLORING AND METHOD OF COLORING Russian patent published in 2001 - IPC

FIELD: coloring of keratin fibers. SUBSTANCE: composition contains at least one N-substituted derivative of 4-oxyindole as a color-forming component and at least one oxidizable base. The invention also deals with new N-substituted derivatives of 4-oxyindole, method of their preparation and their using as a color-forming component for oxidizing keratin fibers in combination with at least one oxidizing base, method of coloring using said derivatives. EFFECT: higher stability of coloring. 18 cl, 2 tbl, 3 ex