Disclosed are triarylmethane dyes of formula (1) D1 - (Z1J)r - Y1-S-A, wherein A is hydrogen a radical of formula (1b) *- S-Y2 - (Z2)- D2 or a radical of formula (1c) *- S-Y3 Y1 and Y2 independently from each other are unsubstituted or substituted, straight-chain or branched, interrupted or uninterrupted C1-C10alkylene C5-C10cycloalkylene C5-C10arylene or-C5-C10arylene-(C1-C10alkylene) Y3 is an unsubstituted or substituted, straight-chain or branched, interrupted or uninterrupted C1C10alkyl C5-C10cycloalkyl C5-C10aryl or-C5-C10aryl-(C1-C10alkyl) Z1 and Z2 independently from each other are *-(CH2)p-C(O)-** *-(CH2CH2-O)s-** *-(CH2)p-C(O)O-** *-(CH2)p-OCO-** -(CH2)P-N(R1)-** -(CH2)P-CON(R1)-** -(CH2)P-(R1)NC(O)-** -0- -S- -S(O)- -S(O)2- or a cationic biradical of a substituted or unsubstituted aromatic or heteroaromatic compound of the formula (1a) (1b) (1c) (1d) or (1e) wherein the asterix * indicates the linkage to D1 and/or D2 the asterix ** indicates the linkage to Y1 and/or Y2 W1 is N or a radical of CR5 R1, R2, R3, R4 and R5 independently from each other are hydrogen C1-C14alkyl C2- C14alkenyl C5-C10aryl C5-C10aryl-(C1-C10alkyl) or -C1-C10alkyl(C5-C10aryl) D1 and D2 independently from each other are hydrogen or the residue of an organic dye selected from the radical of formula (1f), wherein B1 and B2, independently from each other are C6-C10aryl or a 5-7-membered heterocyclic compound, which may be substituted by C1-C12alkyl, C1C12alkoxy, phenyl, hydroxy, halogen, sulfonic acid, carboxylate, or by the radical -NR6Rz or -OR6 B3 is C6-C10arylene, or a bivalent radical of a 5-7-membered heterocyclic compound, which may be substituted by C1-C12alkyl, C1-C12alkoxy, phenyl, hydroxy, halogen, sulfonic acid, carboxylate, or by the radical -NR6R7 or -OR6 R6 and R7 idependently from each other are hydrogen or C1-C12alkyl, which may be substituted by hydroxy or C6-C10aryl or R6 and R7 together with the linking nitrogen atom form a 5 to 7 membered heterocyclic ring or R6
