Heat transfer printing
AssigneeDai Nippon Insatsu Kabushiki Kaisha
InventorsShogo Mizuno, Kyoichi Shimomura, Michiaki Kobayashi
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Abstract
An ink composition for heat transfer printing comprising at least one of carbinol bases of basic dyes or their derivatives, a strong base, a binder and a solvent for dissolving the binder. This ink composition is excellent in storage stability because it contains a carbinol base of a basic dye or its derivative in isolated form as a coloring agent along with a strong base. By using this ink composition, a transfer sheet having high storage stability can be obtained.
Claims16
A transfer sheet comprising a substrate sheet and a coloring layer provided thereon, the coloring layer containing
- from about 1 to about 80 weight percent of a coloring agent comprising at least one of carbinol bases of basic dyes and their derivatives, wherein each of said derivatives is the product of the reaction between a corresponding basic dye and an alcoholate, and said coloring agent is sublimable at a temperature between about 80.degree. C. and about 250.degree. C.;
- from about 1 to about 80 weight percent of a strong base, wherein the mole ratio of said strong base to said coloring agent is between about 1:1 to about 40:1;
- and
- the remainder a binder, wherein all weight percents are based on the total weight of said coloring layer.
A heat transfer printing process which comprises:
- superposing a transfer sheet comprising
- a substrate sheet and
- a coloring layer of a desired pattern
- provided on the substrate sheet, the coloring layer containing from about 1 to about 80 weight percent of a coloring agent comprising at least one of carbinol bases of basic dyes and their derivatives, wherein each of said derivatives is the product of the reaction between a corresponding basic dye and an alcoholate, and said coloring agent is sublimable at a temperature between about 80.degree. C. and about 250.degree. C.;
- from about 1 to about 80 weight percent of a strong base, wherein the mole ratio of said strong base to said coloring agent is between about 1:1 to about 40:1;
- and the remainder a binder, wherein all weight percents are based on the total weight of said coloring layer,
- on a transfer receiving base material consisting of a fiber dyeable with cationic dyes in such a manner that the surface of the transfer sheet provided with the coloring layer contacts the base material to form a superposed structure;
- and
- maintaining the superposed structure under heat, at a temperature sufficient to sublime said coloring agent, and pressure.
Dependencies are inferred from the claim text.