Thermal transfer recording medium
First Claim
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1. In a thermal transfer recording medium which comprises a heat-resistant substrate and a thermally meltable inking layer consisting essentially of a coloring agent, waxes and a binder on said substrate, the improvement which comprises;
- a fluorescent substance consisting of a wax-like substance solid solution or a resin solid solution of a fluorescent dye, said solid solution having a melting or softening point of 50°
-140°
C., is further contained in said inking layer.
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Abstract
The present invention provides a fluorescent thermal transfer recording medium that comprises forming a thermally meltable inking layer consisting essentially of a fluorescent substance, a coloring agent, waxes and a binder on a heat resisting substrate.
62 Citations
16 Claims
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1. In a thermal transfer recording medium which comprises a heat-resistant substrate and a thermally meltable inking layer consisting essentially of a coloring agent, waxes and a binder on said substrate, the improvement which comprises;
- a fluorescent substance consisting of a wax-like substance solid solution or a resin solid solution of a fluorescent dye, said solid solution having a melting or softening point of 50°
-140°
C., is further contained in said inking layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a fluorescent substance consisting of a wax-like substance solid solution or a resin solid solution of a fluorescent dye, said solid solution having a melting or softening point of 50°
-
9. A thermal transfer recording medium comprising a heat-resistant substrate having a thickness of from 3 to 20 micrometers and coated with a thermal melting inking layer having a thickness of about 2 to 10 micrometers, said thermal melting inking layer consisting essentially of from 1 to 30% by weight of a coloring dye or pigment having a fluorescence absorption of 40% or less, from 30 to 90% by weight of waxy material, from 1 to 20% by weight of binder resin and from 7.5 to 70% by weight of a fluorescent substance having a melting point of from 50°
- to 140°
C., said flourescent substance consisting essentially of a mixture of a flourescent organic dye dissolved in or deposited on a waxy material or a resin, said mixture containing from 0.1 to 5 wt. % of said fluorescent organic dye, based on the weight of said fluorescent substance. - View Dependent Claims (10, 11, 12)
- to 140°
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13. A thermal transfer recording medium comprising a heat-resistant substrate having a thickness of from 3 to 20 micrometers coated with a thermal melting inking layer having a thickness of about 2 to 10 micrometers, said thermal melting inking layer comprising from 1 to 30% by weight of a coloring dye or pigment having a fluorescence absorption of 40% or less, from 30 to 90% by weight of waxy material, from 1 to 20% by weight of binder resin and from 7.5 to 70% by weight of a fluorescent substance having a melting point of from 50°
- to 140°
C., said fluorescent substance consisting essentially of a mixture of a fluorescent organic dye dissolved in or deposited on a waxy material or a resin, said mixture containing from 0.1 to 5 wt. % of said fluorescent organic dye, based on the weight of said fluorescent substance, said thermal melting inking layer consisting of a first sub-layer which is substantially free of said coloring dye or pigment, which contains said flourescent substance and is located adjacent to said substrate, and a second sublayer which contains said coloring dye or pigment, which is substantially free of said fluorescent substance and is located remote from said substrate. - View Dependent Claims (14, 15, 16)
- to 140°
Specification