US 12,459,282 B2
Thermal transfer medium and information recording body
Seiko Urata, Tokyo (JP); and Satoshi Gocho, Tokyo (JP)
Assigned to TOPPAN INC., Tokyo (JP)
Filed by TOPPAN INC., Tokyo (JP)
Filed on Apr. 20, 2022, as Appl. No. 17/724,899.
Application 17/724,899 is a continuation of application No. PCT/JP2020/038194, filed on Oct. 8, 2020.
Claims priority of application No. JP2019193371 (JP), filed on Oct. 24, 2019.
Prior Publication US 2022/0243124 A1, Aug. 4, 2022
Int. Cl. B41M 5/385 (2006.01); B41M 5/34 (2006.01); B42D 25/23 (2014.01); B42D 25/378 (2014.01); C09C 1/00 (2006.01)
CPC B41M 5/385 (2013.01) [B41M 5/345 (2013.01); B42D 25/23 (2014.10); B42D 25/378 (2014.10); B41M 2205/06 (2013.01); B41M 2205/30 (2013.01); C09C 1/0015 (2013.01)] 2 Claims
OG exemplary drawing
 
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°.