Title:
【発明の名称】レーザイメージング装置に用いる平版印刷プレート
Document Type and Number:
Japanese Patent JP3397766
Kind Code:
B2
Abstract:
Provided is a positive working, wet lithographic printing member comprising a hydrophilic metal substrate having disposed thereon a hydrophilic layer, an ablative-absorbing, ink-accepting surface layer and, optionally, an ink-accepting overcoat layer that is not ablative-absorbing. Also provided are methods of preparing such lithographic printing plates, and methods of preparing imaged lithographic printing plates from such lithographic printing plates by imagewise exposure to a laser and a subsequent cleaning step to remove residual laser-induced debris and damaged areas from the hydrophilic layer. The use of water-dispersible carbon blacks with polar groups on the surface of the carbon black and water-based polymers, such as a polyvinyl alcohol, in the ablative-absorbing layer, with the optional addition of the durable, ink-accepting overcoat layer that is not ablative absorbing, improves the ease of the cleaning step and also improves the image resolution, adhesion, and durability upon imaging and use of the printing member.
Inventors:
Lorke, thomas, pea
Damato, Richard, Jay
Dunley, Timothy, Jay
Hogdins, George, Earl
Damato, Richard, Jay
Dunley, Timothy, Jay
Hogdins, George, Earl
Application Number:
JP2000528431A
Publication Date:
April 21, 2003
Filing Date:
January 22, 1999
Export Citation:
Assignee:
Press Tech, Inc.
International Classes:
B41N1/14; B41C1/10; (IPC1-7): B41N1/14
Domestic Patent References:
| JP6186750A | ||||
| JP848018A | ||||
| JP9104182A |
Attorney, Agent or Firm:
Kaoru Furuya (2 outside)