Invention Grant
- Patent Title: Method for making a lithographic printing plate
- Patent Title (中): 平版印刷版的制造方法
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Application No.: US11174088Application Date: 2005-06-30
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Publication No.: US07425405B2Publication Date: 2008-09-16
- Inventor: Joan Vermeersch , Pascal Meeus
- Applicant: Joan Vermeersch , Pascal Meeus
- Applicant Address: BE Mortsel
- Assignee: Agfa Graphics, N.V.
- Current Assignee: Agfa Graphics, N.V.
- Current Assignee Address: BE Mortsel
- Agency: Leydig, Voit & Mayer, Ltd
- Priority: EP04103248 20040708
- Main IPC: G03F7/00
- IPC: G03F7/00 ; G03F7/004

Abstract:
A method for making a lithographic printing plate is disclosed which comprises the steps of: (i) providing a negative-working, heat-sensitive lithographic printing plate precursor comprising a support having a hydrophilic surface or which is provided with a hydrophilic layer and a coating provided thereon, the coating comprising an image-recording layer which comprises hydrophobic thermoplastic polymer particles and a hydrophilic binder, wherein the hydrophobic thermoplastic polymer particles have an average particle size in the range from 45 nm to 63 nm, and wherein the amount of the hydrophobic thermoplastic polymer particles in the image-recording layer is at least 70% by weight relative to the image-recording layer; (ii) exposing the coating to heat or infrared light, thereby inducing coalescence of the thermoplastic polymer particles at exposed areas of the coating; (iii) developing the precursor by applying an aqueous alkaline solution, thereby removing non-exposed areas of the coating from the support, wherein the aqueous alkaline solution has a pH ≧10 and comprises a surfactant.
Public/Granted literature
- US20060014104A1 Method for making a lithographic printing plate Public/Granted day:2006-01-19
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