Disclosed are oxazine disulfide dyes of formula (1) D1―(Z1)r―Y1―S―A, wherein A is hydrogen or a radical of formula (1a) *―S―Y2―(Z2)r―D2 Y1 and Y2 independently from each other are unsubstituted or substituted, straight-chain or branched, interrupted or uninterrupted C-1-C-10alkylene C5-C10cycloalkylene C5-C10arylene or-C5-C10arylene-(C1-C10alkylene) 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)-** formula 1(g) -(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 ar the residue of an organic dye selected from the radical of formula (1f) R6 and R7 independently from each other are hydrogen C1-C20alkyl C1-C20alkoxy C3-C6cycloalkyl C5-C10aryl anellated aromatic groups carboxylate or sulfonate groups R8, R9 and R10, R11 and R12 each independently from each other are hydrogen unsubstituted or substituted, straight-chain or branched, monocyclic or polycyclic, interrupted or uninterrupted C1-C14alkyl, C2-C14alkenyl, C6-C10aryl, C6-C10aryl-C1-C10alkyl or C5-C10alkyl(C5-C10aryl) or R8 and R9 or R10 and R11 together with the linking nitrogen atom form a 5 to 7 membered carbocyclic ring which may contain one or more than one hetero atom or R8 is linked to C1 together with N+ forming a 5-7 membered carbocyclic ring or R9 is linked to C2 together with N+ forming a 5-7 membered carbocyclic ring X is -O- or -N(R9)- or -S- p is a number from 0 to 5 r is 0 or 1 and s is a number from 1 to 5. The compounds are useful for the d
