Dye of formula wherein in each case independent from each other W is O, S or NH, R 1 and R 2 is hydrogen, alkyl, alkyl substituted by one or more substituents selected from the group consisting of methoxy, hydroxy, sulfato, sulfo and chloro, aryl, aryl substituted by one or more substituents selected from the group consisting of chloro, acetylamino, sulfo, hydroxy, carboxy, (C 1 -C 4)-alkanoyl, (C 1 -C 4)-alkoxy and (C 1 -C 4)-alkyl or benzyl, R 3 and R 4 is hydrogen, alkyl, hydroxy, aryl, cycloalkyl, alkoxy, thioalkoxy, N-acylamino, N-cinnamoylamino, halogen, cyano, SO 3 M, COOM, nitro, acyl, thioacyl, alkylsulfonyl, aryloyl, trifluoromethyl, heteroaryl, heterocycloalkyl, alkoxycarbonyl, alkoxythiocarbonyl, acyloxy, aryloyloxy or SO 2 -X, wherein X is vinyl or CH 2 CH 2 -Y, wherein Y is a group removable under alkaline conditions, Z - is selected from the group consisting of halogen, sulfate, alkylsulfonate, benzolsulfonate, toluolsulfonate, tetraborofluorate and acetate, A 1 and A 2 is a spacer of formula or whereby the respective spacer A 1 / A 2 is attached to the chromophore at the * position and to the respective reactive anchor T 1 / T 2 at the ** position, and wherein d is an integer from 1 to 4, e is an integer from 0 to 3, f is an integer from 0 to 3, g is an integer from 0 to 3, Q is O, NH or S, R 6 is hydrogen, halogen, alkyl, N-acylamino, alkoxy, thioalkoxy, hydroxy, alkoxycarbonyl, acyl, arylol, acyloxy, aryloyloxy, cycloalkyl, aryl, SO 3 M or COOM, R 8 and R 9 is hydrogen, alkyl, alkoxy, aryl, hydroxyl, NH-CH 2 -CH 2 -OSO 3 H, SO 3 M or COOM, T 1 and T 2 is a reactive anchor of formula, or SO 2 -X whereby the respective reactive anchor T 1 / T 2 is attached to the respective spacer A 1 / A 2 at the *** position, and wherein X is vinyl or CH 2 CH 2 -Y, wherein Y is a group removable under alkaline conditions, and M is hydrogen, lithium, sodium, potassium, ammonium, mono-, di-, tri- or tetra-(C 1 -C 4)-alkylammonium, one equivalent of an alkali earth metal or a monovalent organic cation. W is O, S or NH, R 1 and R 2 is hydrogen, alkyl, alkyl substituted by one or more substituents selected from the group consisting of methoxy, hydroxy, sulfato, sulfo and chloro, aryl, aryl substituted by one or more substituents selected from the group consisting of chloro, acetylamino, sulfo, hydroxy, carboxy, (C 1 -C 4)-alkanoyl, (C 1 -C 4)-alkoxy and (C 1 -C 4)-alkyl or benzyl, R 3 and R 4 is hydrogen, alkyl, hydroxy, aryl, cycloalkyl, alkoxy, thioalkoxy, N-acylamino, N-cinnamoylamino, halogen, cyano, SO 3 M, COOM, nitro, acyl, thioacyl, alkylsulfonyl, aryloyl, trifluoromethyl, heteroaryl, heterocycloalkyl, alkoxycarbonyl, alkoxythiocarbonyl, acyloxy, aryloyloxy or SO 2 -X, wherein X is vinyl or CH 2 CH 2 -Y, wherein Y is a group removable under alkaline conditions, wherein X is vinyl or CH 2 CH 2 -Y, wherein Y is a group removable under alkaline conditions, Z - is selected from the group consisting of halogen, sulfate, alkylsulfonate, benzolsulfonate, toluolsulfonate, tetraborofluorate and acetate, A 1 and A 2 is a spacer of formula or whereby the respective spacer A 1 / A 2 is attached to the chromophore at the * position and to the respective reactive anchor T 1 / T 2 at the ** position, and wherein d is an integer from 1 to 4, e is an integer from 0 to 3, f is an integer from 0 to 3, g is an integer from 0 to 3, Q is O, NH or S, R 6 is hydrogen, halogen, alkyl, N-acylamino, alkoxy, thioalkoxy, hydroxy, alkoxycarbonyl, acyl, arylol, acyloxy, aryloyloxy, cycloalkyl, aryl, SO 3 M or COOM, R 8 and R 9 is hydrogen, alkyl, alkoxy, aryl, hydroxyl, NH-CH 2 -CH 2 -OSO 3 H, SO 3 M or COOM, d is an integer from 1 to 4, e is an integer from 0 to 3, f is an integer from 0 to 3, g is an integer from 0 to 3, Q is O, NH or S, R 6 is hydrogen, halogen, alkyl, N-acylamino, alkoxy, thioalkoxy, hydroxy, alkoxycarbonyl, acyl, arylol, acyloxy, aryloyloxy, cycloalkyl, aryl, SO 3 M or COOM, R 8 and R 9 is hydrogen, alkyl, alkoxy, aryl, hydroxyl, NH-CH 2 -CH 2 -OSO 3 H, SO 3 M or COOM, T 1 and T 2 is a reactive anchor of formula, or SO 2 -X whereby the respective reactive anchor T 1 / T 2 is attached to the respective spacer A 1 / A 2 at the *** position, and wherein X is vinyl or CH 2 CH 2 -Y, wherein Y is a group removable under alkaline conditions, and X is vinyl or CH 2 CH 2 -Y, wherein Y is a group removable under alkaline conditions, M is hydrogen, lithium, sodium, potassium, ammonium, mono-, di-, tri- or tetra-(C 1 -C 4)-alkylammonium, one equivalent of an alkali earth metal or a monovalent organic cation.