Abstract: An object of the present invention is to provide a thermal transfer sheet provided with a black dye layer which can form a black image having jet-black color tone, small gradation difference of black and high resistance to light, and which has little offset of dyes to a back side layer during storage in a wound state. The above object is achieved by a thermal transfer sheet comprising a substrate, a heat resistant slip layer provided on one side of the substrate, and a black dye layer containing a dye and binder provided on the other side of the substrate, wherein the black dye layer contains 2 or 3 kinds of specific magenta dyes and 2 or 3 kinds of cyan dyes in the specific weight ratios with respect to a specific yellow dye.

Abstract: The present invention is directed to the provision of a thermal transfer sheet that can realize a high maximum transfer density in printing, does not cause blocking during storage in a roll form, can suppress, in a roll form, the transfer of a dye onto a backside layer, which faces the dye layer, does not cause an abnormal transfer in which, in printing on an object, the dye is transferred together with a dye layer onto the object, can further reduce the density in a highlight part in printing, and can form printed matter which is excellent in reproduction of gradation from highlight to shadow without any trouble. The thermal transfer sheet comprises a base material, a heat resistant slip layer provided on one side of the base material, and a dye layer provided on the other side of the base material, wherein the dye layer comprises a binder resin having a loss modulus at 60° C. of not less than 107 Pa, a loss modulus at 100° C. of not less than 106 Pa and a loss modulus at 150° C.

Abstract: An object of the present invention is to provide a thermal transfer sheet provided with a black dye layer which can form a black image having jet-black color tone, small gradation difference of black and high resistance to light, and which has little offset of dyes to a back side layer during storage in a wound state. The above object is achieved by a thermal transfer sheet comprising a substrate, a heat resistant slip layer provided on one side of the substrate, and a black dye layer containing a dye and binder provided on the other side of the substrate, wherein the black dye layer contains 2 or 3 kinds of specific magenta dyes and 2 or 3 kinds of cyan dyes in the specific weight ratios with respect to a specific yellow dye.

Abstract: The present invention is directed to the provision of a thermal transfer sheet that can realize a high maximum transfer density in printing, does not cause blocking during storage in a roll form, can suppress, in a roll form, the transfer of a dye onto a backside layer, which faces the dye layer, does not cause an abnormal transfer in which, in printing on an object, the dye is transferred together with a dye layer onto the object, can further reduce the density in a highlight part in printing, and can form printed matter which is excellent in reproduction of gradation from highlight to shadow without any trouble. The thermal transfer sheet comprises a base material, a heat resistant slip layer provided on one side of the base material, and a dye layer provided on the other side of the base material, wherein the dye layer comprises a binder resin having a loss modulus at 60° C. of not less than 107 Pa, a loss modulus at 100° C. of not less than 106 Pa and a loss modulus at 150° C.

Abstract: The present invention relates to a thermal transfer sheet, comprising a substrate; a heat-resistant sliding layer provided on one surface of the substrate; and a dye layer comprising at least a dye and a binder resin provided on the other surface of the substrate, wherein the binder resin comprises a styrene-containing polyol resin, which which meets a demand for speeding up of printing speed of thermal transfer, and densification and quality improvement of thermally transferred images, particularly meets to a demand for densification of thermally transferred images and in which the migration of dyes to the heat-resistant sliding layer and the scumming are prevented.