Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1978-10-23
1980-05-06
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430350, 430517, G03C 102
Patent
active
042015901
ABSTRACT:
A heat bleachable material comprises (i) at least one hexaarylbiimidazole with (ii) at least one dye, especially an antihalation or filter dye, that is reactive with the product of the hexaarylbiimidazole formed upon heating the material to a temperature above about 90.degree. C. This provides a material that becomes at least 40% colorless within about 20 minutes, typically within about 30 seconds, upon heating to a temperature as described. The dye-containing material is especially useful for antihalation and filter purposes in a photographic element. The material can be a heat bleachable dye layer of a photothermographic element. The heat bleachable dye layer can also be useful in a thermographic element.
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Research Disclosure, Item 12617, pp. 12-30, Oct. 1974.
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Research Disclosure, Item 17029, vol. 170, Jun. 1978.
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Adin Anthony
Levinson Steven R.
Brammer Jack P.
Eastman Kodak Company
Knapp Richard E.
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