The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 09, 2012
Filed:
Mar. 26, 2008
Tomoko Araki, Tokyo-to, JP;
Tomoko Araki, Tokyo-to, JP;
Dai Nippon Printing Co., Ltd., Tokyo-to, JP;
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.