Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Patent
1994-08-24
1998-07-07
Lesmes, George F.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
4302731, G03F 700
Patent
active
057766614
ABSTRACT:
A method for curing a photosensitive resin composition includes use of an especially thin gauge protective cover film, preferably incorporating a coating to permit ease of removal after imaging. The method also uses a photosensitive resin composition incorporating a photospeed modified capping layer to selectively retard image growth during exposure. To eliminate undesirable defects in the cured photopolymer, a glass plate which had previously contacted and flattened the composition, is separated from the composition by at least 0.025 inches after partially curing the composition but prior to completely curing the composition. The partial cure of the composition is achieved by directing light to the composition from a source of actinic radiation positioned about 6 to 30 inches from the resin composition, where the actinic radiation has a wavelength of maximum intensity of about 365 to about 375 nm.
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Merigraph.RTM. systems for the Printing Industry, Type 3040, Exposure Unit, 10-86, pp. 31-36.
Casaletto Nicola
Gibbons Wayne M.
Rach Joseph F.
Cordani John L.
Lesmes George F.
MacDermid Imaging Technology, Inc.
Weiner Laura
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