| 摘要 |
PURPOSE: To improve whiteness and long-term stability of a color image of a heat-sensitive recording body by containing at least one kind of aromatic compound having sulfonyl(thio)urea, etc., represented by a specific formula in a developer contained in the heat-sensitive layer and also containing an organic compound having an epoxy and/or aziridinyl group the heat-sensitive coloring layer. CONSTITUTION: A heat-sensitive recording body used for a commuter pass or the like is provided with a heat-sensitive coloring layer containing a developer reacting with and coloring a dye precursor formed on one face of a sheet-shaped base when being heated. At least one aromatic compound represented by one formula having at least one sulfonyl(thio)urea group and at least one hydroxyl group per molecule is contained in the developer. At least either one selected out of an epoxy compound having at least one epoxy group or an aziridinyl compound having at least one aziridinyl group is contained in the heat-sensitive coloring layer. In the formula, X represents an oxygen atom or a sulfur atom. |
