Method of making planographic printing plate and planographic printing plate
US9091926B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2013 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Feb 1, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41C2210/266
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method of making a planographic printing plate includes exposing, to infrared light, a planographic printing plate precursor including a recording layer provided on a substrate, and developing the precursor using an aqueous alkaline solution. The recording layer comprises a copolymer containing a structural unit derived from (meth)acrylonitrile and at structural unit derived from styrene, a water-insoluble and alkali-soluble resin, and an infrared absorbing agent, the solubility of the recording layer in the aqueous alkaline solution being increased by the exposure. The aqueous alkaline solution has a pH of 8.5 to 10.8 and contains a betaine-based amphoteric surfactant and an ammonium salt represented by Formula (I):
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.