A negative-working CTP plate which is superior in resolution and printing resistance of the image area of a press plate is provided, which is obtained by forming a latent image on a heat-sensitive layer in a heat-sensitive lithographic printing plate comprising a substrate having a hydrophilic surface and a heat-sensitive layer made of an alkali-soluble polymer formed on the surface of the substrate, using heat generated upon irradiation with laser light, and developing the heat-sensitive layer using an alkaline developing solution. In the heat-sensitive lithographic printing plate comprising a substrate having a hydrophilic surface, and a heat-sensitive layer made of an alkali-soluble polymer formed on the surface of the substrate, an advancing contact angle (.theta..sup.f1) of the surface of the heat-sensitive layer with water at 25.degree. C. is within a range from 70.degree. to 110.degree., a receding contact angle (.theta..sup.b2) of the surface of the heat-sensitive layer with water at 25.degree. C. after heating at 150.degree. C. for 3 minutes is larger than a receding contact angle (.theta..sup.b1) of the surface of the heat-sensitive layer with water at 25.degree. C. before heating, and a difference in receding contact angle before and after heating, (.theta..sup.b2-.theta..sup.b1), is larger than 1.degree. and is smaller than 40.degree..

 
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> Thermally developable materials processable at lower temperatures

~ 00313