Thermal transfer medium and information recording body

Patent metadata

Field	Value
Publication number	US-12459282-B2
Application number	US-202217724899-A
Country	US
Kind code	B2
Filing date	Apr 20, 2022
Priority date	Oct 24, 2019
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A thermal transfer medium includes a support, and a plurality of ink panels individually made of a thermal transfer ink. The plurality of ink panels include two or more ink panels selected from the group consisting of a first ink panel in which the thermal transfer ink is a first ink containing a specified pigment as a color material, a second ink panel in which the thermal transfer ink is a second ink containing a specified second pigment as a color material, and a third ink panel in which the thermal transfer ink is a third ink containing a specified third pigment as a color material.

First claim

What is claimed is:

1 . A thermal transfer medium, comprising:
a support; and a plurality of ink panels individually provided on the support and each made of a thermal transfer ink, wherein the plurality of ink panels comprise
a first ink panel in which the thermal transfer ink is a first ink containing a first pigment as a color material, the first pigment consists of first flake nuclei made of synthetic mica, and a first coating made of iron(III) oxide and covering the first nuclei,
a second ink panel in which the thermal transfer ink is a second ink containing a second pigment as a color material, the second pigment consists of second flake nuclei made of synthetic mica, a second coating made of titanium dioxide and covering the second nuclei, and a third coating made of iron(III) oxide and covering the second coating, and
a third ink panel in which the thermal transfer ink is a third ink containing a third pigment as a color material, the third pigment consists of third flake nuclei made of synthetic mica, a fourth coating made of silicon dioxide and covering the third nuclei, and a fifth coating made of iron(III) oxide covering the fourth coating, the fourth coating being different from the second coating in optical thickness, wherein the first ink remains unchanged in color with a change of an observation angle θ, the second ink has a reddish brown color of the iron(III) oxide at the observation angle of 0° to 15°; a green color at the observation angle of 30° and a blue color at the observation angle of 60°; and the third ink has a reddish brown color of the iron(III) oxide at the observation angle of 0° to 15°; a green color at the observation angle of 30° and a green color at the observation angle of 60°.

2 . A thermal transfer medium in the form of a roll, comprising:
a support; and a plurality of ink panels individually provided on the support and each made of a thermal transfer ink, wherein the plurality of ink panels comprise
a first ink panel in which the thermal transfer ink is a first ink containing a first pigment as a color material, the first pigment consists of first flake nuclei made of synthetic mica, and a first coating made of iron(III) oxide and covering the first nuclei,
a second ink panel in which the thermal transfer ink is a second ink containing a second pigment as a color material, the second pigment consists of second flake nuclei made of synthetic mica, a second coating made of titanium dioxide and covering the second nuclei, and a third coating made of iron(III) oxide and covering the second coating, and
a third ink panel in which the thermal transfer ink is a third ink containing a third pigment as a color material, the third pigment consists of third flake nuclei made of synthetic mica, a fourth coating made of silicon dioxide and covering the third nuclei, and a fifth coating made of iron(III) oxide covering the fourth coating, the fourth coating being different from the second coating in optical thickness, wherein the first ink remains unchanged in color with a change of an observation angle θ, the second ink has a reddish brown color of the iron(III) oxide at the observation angle of 0° to 15°; a green color at the observation angle of 30° and a blue color at the observation angle of 60°; and the third ink has a reddish brown color of the iron(III) oxide at the observation angle of 0° to 15°; a green color at the observation angle of 30° and a green color at the observation angle of 60°.

Assignees

• Toppan Inc

Inventors

• Urata Seiko
• Gocho Satoshi

Classifications

• B41M2205/06

  relating to melt (thermal) mass transfer · CPC title

• C09C1/0015

  Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings · CPC title

• B41M2205/30

  Thermal donors, e.g. thermal ribbons · CPC title

• B41M5/345

  by thermal transfer of dyes or pigments · CPC title

• B42D25/378

  Special inks · CPC title