Dye sensitized photographic imaging system

Details Dye sensitized photographic imaging system Dye sensitized photographic imaging system

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G03C 1/72 (2006.01) G03F 7/00 (2006.01) G03F 7/008 (2006.01) G03F 7/028 (2006.01) G03F 7/031 (2006.01)

Patent

CA 1329042

DYE SENSITIZED PHOTOGRAPHIC IMAGING SYSTEM Abstract of the Disclosure A photographic imaging system is disclosed comprised of an imaging dye or A precursor thereof, a hardenable organic component containing ethylenic unsaturation sites and capable of imagewise modula- ting mobility of the dye or dye precursor as a func- tion of addition at the sites of ethylenic unsatura- tion, and coinitiators for ethylenic addition. The coinitiators include an azinium salt activator and a photosensitizer which is a dye exhibiting a reduction potential which in relation to that of said ionized azinium salt activator is at most 0.1 volt more posi- tive, with the further proviso that, when the photo- sensitizer is a keto dye having its principal absorp- tion peak at a wavelength shorter than 550 nm, it exhibits when excited by imaging radiation an inter- system crossing efficiency to a triplet state of less than 10 percent.

547870

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