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AssigneeSony Corporation
InventorsTetsuya Abe, Toshio Fukuda, Yoshio Fujiwara
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A thermal transfer system comprises, in combination, an ink ribbon which has an ink layer containing a dye and a printing sheet having an image-receiving layer. In the system, when the ink layer is heated in an imagewise pattern, the dye in the ink layer is melted or sublimated and transferred to the image-receiving layer in the imagewise pattern. The dye in the ink layer is selected from the group consisting of disazo dyes, isothiazole azo dyes and mixtures thereof and the image-receiving layer comprises a cellulose ester resin. The printed matter obtained has good light fastness and fading resistance in the dark comparable to silver salt photographs. The ink ribbon and the printing sheet are also provided, respectively.
A printing sheet which is adapted for use in a thermal transfer system wherein an image is formed by heating an ink ribbon which has an ink layer containing a dye selected from the group consisting of disazo dyes, isothiazole azo dyes and mixtures thereof thereby melting or sublimating the dye in an imagewise pattern and transferring the dye to a printing sheet, said printing sheet comprising an image-receiving layer which comprises a cellulose ester resin selected from the group consisting of cellulose acetate propionate and cellulose acetate butyrate as its main component.
A thermal transfer system comprising an ink ribbon having an ink layer containing a dye, said dye being selected from the group consisting of disazo dyes, isothiazole azo dyes and mixtures thereof, and a printing sheet having an image receiving layer comprising a cellulose ester resin.
A thermal transfer printing method for transferring an image pattern from an ink ribbon to a printing sheet having an image receiving layer comprising the steps of:
Dependencies are inferred from the claim text.