Patent ID: 8614317

Claim:
A polycyclic dye of the general formula in which R′ in each occurrence and independently of one another denotes hydrogen or a hydrocarbon group with 1-20 C atoms where the hydrocarbon group can optionally contain one or more heteroatoms or/and one or more substituents, R in each occurrence and independently of one another denotes hydrogen, halogen, a hydroxy, amino, sulfo, carboxy or aldehyde group or a hydrocarbon group with 1-20 C atoms where the hydrocarbon group can optionally contain one or more heteroatoms or/and one or more substituents, or R′ and R together form a ring system which can contain one or more multiple bonds, R 1 denotes hydrogen or a hydrocarbon group with 1 to 20 C atoms, where the hydrocarbon group can optionally contain one or more heteroatoms or/and one or more substituents, R 2 , R 3 , R 4 , R 5 and R 8 each independently denote hydrogen, halogen, a hydroxy, amino, sulfo or carboxy or aldehyde group or a saturated or unsaturated, straight-chained, branched or cyclic hydrocarbon group with 1 to 20 C atoms where the hydrocarbon group can optionally contain one or more heteroatoms or/and one or more substituents, and X denotes OH, halogen, —O—R 9 , —S—R 10 or —NR 11 R 12 where R 9 , R 10 , R 11 and R 12 each independently of one another denote hydrogen or a C1 to C20 hydrocarbon which can optionally contain one or more heteroatoms or one or more substituents, and Y denotes O, S or C(R) 2 , and A − denotes an anion.