Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Finishing or perfecting composition or product
Patent
1981-05-12
1983-01-25
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Finishing or perfecting composition or product
430149, 430309, G03C 524, G03C 534, G03F 702, G03F 708
Patent
active
043704069
ABSTRACT:
A single-phase, non-emulsion water containing subtractive developer for lithographic plates having photopolymer coatings is provided. These developers include water and an active or primary solvent which is only partially soluble in water and which is a good solvent for the photopolymer of a lithographic plate that has not been exposed to and insolubilized by actinic radiation, this active solvent typically being present at a concentration near its water solubility limit. Preferably, a cosolvent is also included to increase the water solubility of the active solvent when necessary. A desensitizer may be included to impart to the formulation the properties of a one-step developer or of a finisher. Formulation and development methods for these developers are also included, and they may be used either as developers or as a machine developer solution replenisher.
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Bowers Jr. Charles L.
Richardson Graphics Company
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