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US 7,452,847 B2Granted
Reversible thermosensitive recording medium, reversible thermosensitive recording label, reversible thermosensitive recording device, image processing apparatus, and image processing method
AssigneeRicoh Company, Ltd.
InventorsHiroki Kuboyama, Satoshi Arai, Tadafumi Tatewaki, Satoru Sampei
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Abstract
A reversible thermosensitive recording medium including a substrate, and a thermosensitive layer including an electron donating coloring compound, an electron accepting compound, and a phenol anti-oxidation agent containing one or more sulfur atoms having an alkyl group on one side. In addition, the thermosensitive layer reversibly changes its color tone depending on temperature to reversibly record and erase an image thereon.
Claims21
A reversible thermosensitive recording medium, comprising:
- a substrate;
- and
- a thermosensitive layer, comprising:
- an electron donating coloring compound;
- an electron accepting compound;
- and
- a phenol anti-oxidation agent comprising one or more sulfur atoms comprising an alkyl group on one side,
- wherein the thermosensitive layer reversibly changes its color tone depending on temperature to reversibly record and erase an image thereon;
- wherein the phenol anti-oxidation agent is represented by a compound represented by the chemical structural formula (1):
- wherein R1 and R2 independently represent an alkyl group;
- and
- wherein a content of the phenol anti-oxidation agent occupies 1 to 10 weight % based on a weight of the thermosensitive layer.
9 more elements
Dependencies are inferred from the claim text.