Aqueous developer composition for developing negative working lithographic printing plate
US5035982A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03F7/32
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An aqueous developing composition including PA0 (a) a nontoxic developing vehicle which is a non-solvent for any of the components of the lithographic plate; PA0 (b) a first surfactant comprising a sodium, lithium or potassium salt of xylene sulfonic acid; PA0 (c) a second surfactant comprising a sodium, lithium or potassium salt of toluene, ethyl benzene, cumene or mesitylene sulfonic acid, PA0 (d) a third surfactant comprising a sodium, lithium or potassium salt of an alkyl benzene sulfonic acid, the alkyl group containing at least 10 carbon atoms or an alkyl naphthalene sulfonic acid, the alkyl group containing from 1 to 4 carbon atoms; PA0 (e) a cold water soluble film forming agent; PA0 (f) an alkanol amine desensitizing agent; and PA0 (g) an acid to control the pH of the developing composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.