Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Finishing or perfecting composition or product
Patent
1989-08-07
1990-07-31
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Finishing or perfecting composition or product
430309, 430325, G03C 524, G03C 534
Patent
active
049450301
ABSTRACT:
A developing fluid for positive-acting, negative-acting and reversible lithographic printing plates comprises a metasilicate as alkali together with an ethylene oxide/propylene oxide block copolymer and, optionally, sodium tetraborate, a phosphate ester, and anti-foaming agent and a water-softening or sequestering agent. The fluid has a high alkali content for reducing the need for frequent replenishment while at the same time minimizing damage to the image particularly in negative and reversed plates and avoiding unacceptable foaming and turbidity.
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Riley David S.
Turner Gregory P.
Doody Patrick A.
Horsell Graphics Industries Limited
Michl Paul R.
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