Patent ID: 7674568

Claim:
A polymeric optical recording medium substrate with a grooved side coated on the grooved side with a liquid composition, which does not swell or dissolve the polymeric substrate and provides superior groove filling, comprising a) from 0.1 to 20% by weight of a dye having a solid state absorption band maximum in the spectral region from 300 to 800 nm, b) from 0.5 to 79.9% by weight of a compound of formula wherein R 1 to R 8 are H, CH 3 or C 2 H 5 , with the proviso that the total number of carbon atoms in R 1 to R 8 is 1 or 2, c) from 20% to 99.4% by weight of a linear, branched and/or cyclic non-aromatic hydrocarbon wherein the weight ratio of hydrocarbon to compound of formula (I) is from 17:1 to 76:1, and d) optionally from 0 to 99.4% by weight of one or more further components, all based on the weight of the solution.