THERMALLY BLEACHABLE FILTER DYE COMPOSITIONS COMPRISING BENZOTHIAZINE-DIOXIDE ARYLIDENE DYES AND BASE PRECURSORS FOR USE IN A PHOTOTHERMOGRAPHIC ELEMENT

摘要

This invention relates to a photothermographic element comprising a support, at least one photothermographic imaging layer, and at least one filter layer, wherein the filer layer comprises a heat-bleachable composition comprising a benzothiazine arylidiene filter dye, which filter dye is in the presence of an effective amount of a base precursor.