Photosensitive reproduction elements for forming negative tonable images
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United States of America Patent
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Nov 9, 1982
Grant Date -
N/A
app pub date -
Jun 17, 1981
filing date -
Dec 22, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A nonsilver photosensitive reproduction element which comprises a support bearing a layer of a photosensitive composition which comprises (1) at least one thermoplastic binder, (2) a photosensitive system consisting essentially of (a) a hexaarylbiimidazole compound and (b) a dihydropyridine compound; and optionally (3) a plasticizer, and (4) a thioamide, thiolactam or thiocarbanilic acid ester of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are as defined. The photosensitive element is useful in preparing negative tonable images.
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