The present invention provides a pyridine derivative represented by the following formula A or B, a dye produced by coupling the pyridine derivative A or B with an arbitray coupler and a thermal transfer sheet wherein use is made of the dye. In a thermal transfer process wherein use is made of a sublimable dye, the dye and the thermal transfer sheet according to the present invention can form a clear image having a sufficient density and an excellent light fastness.
本发明提供了一种由下式 A 或 B 表示的
吡啶衍生物、一种通过将
吡啶衍生物 A 或 B 与一种 arbitray
偶联剂偶联而制得的
染料以及一种使用该
染料的热转印片材。 在使用升华
染料的热转印工艺中,根据本发明的
染料和热转印片材可以形成具有足够密度和优异耐光性的清晰图像。