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 having a dye layer containing a polyvinyl acetal modified with a compound of the formula [1] and a polyvinyl acetal modified with a compound of the formula [2]:; wherein R¹ represents a substituted alkyl group, etc; R² represents H, etc;; wherein R³ represents a linear hydrocarbon group, etc; R⁴ represents a hydrogen atom, etc.