The present invention provides a thermally sensitive recording medium that possesses a thermally sensitive color developing layer containing colorless or pale colored basic leuco dye and an organic color developer as main components on a substrate, wherein said thermally sensitive recording medium contains at least one kind of an ultraviolet ray absorbent of aqueous emulsion type polymer composed of an emulsion copolymerized compound of (a) ultraviolet ray absorbing monomer, (b) vinyl compound monomer that can copolymerize with said monomer, (c) hydrophilic monomer and (d) reactive emulsifier.

A invenção atual fornece um meio tèrmica sensível da gravação que possua uma camada se tornando da cor tèrmica sensível que contem a tintura básica colorida incolor ou pálida do leuco e um colaborador de cor orgânico como componentes principais em uma carcaça, wherein o meio sensível tèrmica dito da gravação contem ao menos um tipo de um absorvente ultravioleta do raio do tipo aqueous polímero do emulsion composto de um emulsion copolymerized o composto (a) do monomer absorvente do raio ultravioleta, (b) o monomer composto do vinil que pode copolymerize com monomer dito, (c) monomer hydrophilic e (d) emulsifier reactive.

 
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