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Title:
PLANOGRAPHIC PRINTING PLATE
Document Type and Number:
Japanese Patent JPH0720629
Kind Code:
A
Abstract:

PURPOSE: To provide an improved printing plate which can be used both as a positive type plate and as a negative type plate, is useful for a plate capable of direct-laser-addressing and can be treated by a simple procedure only requiring a single exposure.

CONSTITUTION: A planographic printing plate is constituted of a supporting body and an image generating layer which is sensitive to both UV rays and infrared rays and can function both in a positive type method and in a negative type method. Owing to an image-wise exposure process with an active radiation and a heating process, solubility of the image generating layer in an aqueous alkaline developer decreases in an exposed region and increases in an unexposed region. Further, the image generating layer contains (1) a resol resin, (2) a novolak resin, (3) a latent Bronsted acid and (4) an infrared ray absorber.


Inventors:
Haley, Neil F.
Corbiere, Steven L.
Application Number:
JP1994000102377
Publication Date:
January 24, 1995
Filing Date:
May 17, 1994
Export Citation:
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Assignee:
EASTMAN KODAK CO
International Classes:
B41C1/05; B41C1/10; G03F7/00; G03F7/004; G03F7/023; G03F7/029; G03F7/09; G03F7/20; G03F7/38; B41M5/36; (IPC1-7): G03F7/004; G03F7/004; B41C1/05; G03F7/00; G03F7/023; G03F7/029
Attorney, Agent or Firm:
石田 敬 (外3名)