Patent ID: 11945250
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 2:
3. A thermal transfer sheet comprising a dye layer disposed on a first surface of a substrate film, wherein
the dye layer includes a decolorizable dye,
the decolorizable dye has a color difference ΔE*ab between a color A and a color B of 10 or less, where the color A is a color of a transfer-receiving body before the decolorizable dye is transferred to the transfer-receiving body, the color B is a color of a portion of the transfer-receiving body with the decolorizable dye having been transferred thereto, and the color of the portion is a color after the portion is irradiated by a xenon lamp at an irradiation intensity of 1.2 (W/m2) for 50 hours, the portion having a reflection density of 0.5 or greater before being irradiated by the xenon lamp,
the decolorizable dye is at least one of a compound represented by structural formula (1) below, a compound represented by structural formula (2) below, a compound represented by structural formula (3) below, and a compound represented by structural formula (4) below, and
a decolorizable dye layer and a light-fast dye layer are disposed in a planar and sequential manner, the decolorizable dye layer including the decolorizable dye, the light-fast dye layer including a light-fast dye that is more light-fast than the decolorizable dye:,