| abstract |
A cyan dye of the formula: (* CHEMICAL STRUCTURE *) wherein X1 represents halogen; X2 represents hydrogen, alkyl, alkoxy, halogen, alkylcarbonylamino or perfluoroalkyl; R1 and R2 independently represent alkyl, phenyl, perfluoroalkyl, halogen-substituted alkyl, or halogen-substituted phenyl or alkyl-substituted phenyl; R3 represents alkyl; R4 represents alkyl, alkoxy or perfluoroalkyl; and n is an integer of 1 or more. A thermal transfer sheet comprising a substrate and an ink layer, the ink layer comprising a cyan dye of the formula described above, is also disclosed. |