| abstract |
A thermaltransfer printing sheet comprising a substrate having a coating comprising at least one azo dye of the formula:whereinA is the residue of a diazotisable heteroaromatic amine, A-NH<sub>7</sub>, in which A is selected from imidazolyl, pyrazolyl, thiazolyl, benzothiazolyl, isothiazolyl, benzoisothiazolyl, pyridoisothiazolyl & thienyl& E is the residue of an aromatic coupling component, E-X wherein X is a group displaceable by a diazotised aromatic amine and E is optionally substituted aminophenyl, tetrahydroquinolinyl, julolidyl or aminoquinolmyl.and a process for the transfer of dye from the transfer sheet to a receiver sheet by the selective application of heat to the transfer sheet while it is contact with the receiver sheet. |