| 摘要 |
A color-forming composition which comprises a chromogenic dye and, as a color developer, an L-ascorbic acid 5,6-O-ketal or -acetal or an erythorbic acid 5,6-O-ketal or -acetal has good storage stability before color development. Images after color development are distinct and have high color density and good durability. The composition is useful as a color-forming composition in heat-sensitive or pressure-sensitive recording materials.
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