| 摘要 |
PROBLEM TO BE SOLVED: To provide a reversible thermal recording body in which contrast of a coloring part and a decoloring part is high and shelf stability of an image is excellent. SOLUTION: Thermal coloring and decoloring of an image are enabled by incorporating an aromatic compound which has >=11 C long-chain alkyl group and a sulfonylurea group and is shown in a formula as a developer together with a dye precursor into the thermal recording layer of a reversible thermal recording body. In the formula, R<1> =naphthy1 or low alkoxyl group-substituted phenyl group, Y= -NHCO-, -OCO-, -O-, -OSO2 -, etc., n=11-30. |
