Photographic compositions, elements and processes for the production of formazan dye images of enhanced red absorption

摘要

It is disclosed to form a composition of matter comprised of a photoreductant and a tetrazolium salt which includes as a 5-position substituent a benzene ring attached to the tetrazole nucleus having at least one meta or para alkyl or alkoxy substituent and 2- and 3-position tetrazole nucleus substituents which are, collectively, predominantly electronegative. This composition of matter can be contained within a radiation-sensitive image-recording layer of a photographic element. By imagewise exposing the radiation-sensitive layer followed by treating with a base the tetrazolium salt in exposed areas can be converted to a formazan dye of enhanced red absorption characteristics.