Thermal transfer ink sheet, ink cartridge, coating composition for dye layer of thermal transfer ink sheet, and thermal transfer recording method

摘要

A thermal transfer ink sheet comprising, as formed on a support, a dye layer containing a thermal transferable dye in a resin binder, wherein the dye layer contains a polyvinyl acetal modified with at least one compound of the following formula [1]:
wherein one of R 1 and R 2 is a branched hydrocarbon group and the other is a hydrogen atom or a hydrocarbon group, or R 1 and R 2 are groups that bond to each other to form a cyclic hydrocarbon.