Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Reexamination Certificate
2006-10-24
2006-10-24
Schilling, Richard L. (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
C430S325000, C430S331000
Reexamination Certificate
active
07125648
ABSTRACT:
The present invention provides a method for forming images comprising the steps of imagewise exposing a negative-working image-forming material which comprises a substrate provided thereon with an image-recording layer comprising a photopolymerization initiator system sensitive to light rays whose wavelength falls within the visible to ultraviolet ranges, a polymerizable compound carrying at least one ethylenically unsaturated group and a binder polymer and then developing the imagewise exposed image-forming material with a developer which contains at least one carbonate, at least one hydrogen carbonate and at least one alkali silicate and which has a pH value ranging from 9 to 13.0, wherein the ratio of the total molar number a of the carbonate and the hydrogen carbonate to the molar number b of the SiO2component present in the alkali silicate: a/b ranges from 1:0.3 to 1:2 and the total molar number of these components: a+b ranges from 0.1 to 2 mole/L. The present invention provides a stable processing method even when an image-forming material having a narrow latitude (small discrimination) in developing is utilized.
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Buchanan & Ingersoll & Rooney PC
Fuji Photo Film Co. , Ltd.
Schilling Richard L.
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