Importance

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Abstract

In a thermal transfer-type printing method in which an image is formed on printing paper by the selective transfer thereto of disperse dye from a dye carrier of flexible sheet material in response to the selective application of thermal energy to the carrier while in contact with a surface of the printing paper, the latter is comprised of a base of cellulose fibers and resin into which the disperse dye diffuses for producing a clear definition of the image. The resin is desirably polyester or acetyl cellulose either in the form of fibers which are co-mingled with the cellulose fibers in the base of the printing paper, or in the form of a coating on a surface of the paper base. After the image has been formed by thermal transfer on a surface of the printing paper, a thin transparent film, preferably of polyester, is laminated over the printed surface by a polyester adhesive and the application of heat and pressure so that recrystallized disperse dye remaining on the surface of the printing paper is further diffused into the polyester adhesive.

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First Claim