Radiation imagery chemistry: process – composition – or product th – Diazo reproduction – process – composition – or product – Composition or product which contains radiation sensitive...
Reexamination Certificate
2005-02-08
2005-02-08
Chu, John S. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Diazo reproduction, process, composition, or product
Composition or product which contains radiation sensitive...
C430S166000, C430S302000, C430S330000
Reexamination Certificate
active
06852464
ABSTRACT:
Methods of manufacturing multi-layer thermally imageable elements useful as lithographic printing plate precursors are disclosed. The elements comprise a substrate, an underlayer, and an imageable layer. The imageable layer comprises a first polymeric material and o-diazonaphthoquinone containing material. After the underlayer has been coated over the substrate and the imageable layer has been coated over the underlayer, the element is heated to between about 130° C. and about 200° C. for a time sufficient to decrease the sensitivity of the imageable element to the white light.
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