| 摘要 |
A heat-developable recording material comprises a support, at least one undercoat layer and at least one image-forming layer, in this order, wherein the undercoat layer comprises: polyester resins containing at least two kinds of water-soluble and water-dispersible polyester resins, each of which has a different glass transition temperature (Tg); and fine particles having an average particle diameter (k) of from 0.1 mum to 2.0 mum, and the undercoat layer has an average film thickness (d) of from 0.05 mum to 1.0 mum, and (k)/(d) is in the range from 2.0 to 10.0.
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