Thermal transfer printing.

摘要

A thermal transfer printing sheet, desirable for use in a thermal transfer printing process, comprising a substrate having a coating comprising a dye of the formula: wherein X represents nitro or -COOR<1> in which R<1> is an optionally substituted hydrocarbyl radical; Y represents an optionally substituted C1-10-alkyl or alkoxy radical; Z represents an alkyl radical, and R represents an alkyl radical which may be interrupted by one or two -O- or -COO- links.