Eastman-Kodak Company

Gordon Young

Ralph B Nielsen

Charles Leo Bauer

Edward L Dedio

Ronald Di Felice

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A thermally processable imaging element comprises a support bearing an imaging layer comprising a hydrophobic binder and a boron compound of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and are selected from substituted or unsubstituted alkyl groups, and substituted or unsubstituted aryl groups.

Thermally processable imaging element having a crosslinked hydrophobic

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A photothermographic element comprising a photosensitive silver halide, an organic silver salt and a reducing agent in concentrations such that imagewise exposure to actinic radiation generates from the silver halide a catalyst which accelerates an image-forming reaction between the organic silver salt and the reducing agent is processed by a method comprising the steps of (1) imagewise-exposing the element to actinic radiation to form a latent image therein, (2) subjecting the imagewise-exposed element to a first heating step at a temperature and for a time sufficient to intensify the latent image but insufficient to produce a visible image, and thereafter (3) subjecting the element to a second heating step at a temperature and for a time sufficient to produce a visible image. This method of 'thermal latensification' serves to greatly reduce the significant speed losses that were heretofore encountered with photothermographic elements when considerable time was allowed to lapse between exposure to actinic radiation and generation of the visible image by heating.

Method for processing a photothermographic element

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Carrollton, TX, United States of America

Gordon Young