Armstrong, Kratz, Quintos, Hanson & Brooks, LLP
Heat-sensitive lithographic printing plate and image forming method
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 (θf1) of the surface of the heat-sensitive layer with water at 25° C. is within a range from 70° to 110°, a receding contact angle (θb2) of the surface of the heat-sensitive layer with water at 25° C. after heating at 150° C. for 3 minutes is larger than a receding contact angle (θb1) of the surface of the heat-sensitive layer with water at 25° C. before heating, and a difference in receding contact angle before and after heating, (θb2−θb1), is larger than 1° and is smaller than 40°.
Dainippon Ink and Chemicals, Inc.
B B B Y B Y B B
B41C B41C B41N Y10S B41C Y10S B41C B41C
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Yasuyuki Yasuyuki Naohito Hisatomo
Suzuki Watanabe Saito Yonehara