| 摘要 |
A thermal transfer printing sheet, suitable for use in a thermal transfer printing process, comprising a substrate having a coating comprising a water-insoluble dye of the formula: <CHEM> wherein R represents the residue of an active methylene compound; X represents hydrogen, halogen or an optionally substituted alkyl, aryl or heteroaryl radical; Y represents cyano, nitro, alkanoyl, aroyl, alklsulphonyl, arylsulphonyl or a group of the formula -COOR<1> or -CONR<2>R<3> wherein R<1> represents a hydrocarbyl radical and each of R<2> and R<3>, independently, represents hydrogen or a hydrocarbyl radical; and E represents the residue of a coupling component. |
