Thermal transfer sheet
AssigneeDai Nippon Printing Co., Ltd.
InventorTomoko Araki
Life of this patent
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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.
Claims3
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 a binder provided on the other side of the substrate,
- wherein the black dye layer contains, with respect to 1 part by weight of a dye represented by the following Formula (1), 0.8 to 1.1 parts by weight of a dye represented by the following Formula (2a), dye represented by the following Formula (2b), or the sum of the dye represented by the following Formula (2a) and the dye represented by the following Formula (2b), 1.2 to 1.6 parts by weight of a dye represented by the following Formula (3), 1.3 to 1.7 parts by weight of a dye represented by the following Formula (4a), a dye represented by the following Formula (4b), or the sum of the dye represented by the following Formula (4a) and the dye represented by the following Formula (4b), and 1.8 to 2.3 parts by weight of a dye represented by the following Formula (5):
Dependencies are inferred from the claim text.