Photographic silver halide material containing a ballasted electron-donor precursor compound.

摘要

Photographic silver halide material containing a ballasted electron-donor precursor compound yielding by alkaline hydrolysis an electron-donor compound (ED-compound) capable (1) of donating electrons to an oxidized electron-accepting silver halide developing agent e.g. for scavenging it, said electron-donor precursor compound corresponding to the following general formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="28" wi="42" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein:
<UnorderedLists id="ula01" listStyle="none"><ListItem>R represents hydrogen or a substituent, e.g. an acyl group, which on hydrolytic removal allows the replacement of R by H,</ListItem><ListItem>R', R<Sup>2</Sup> and R<Sup>3</Sup> (same or different) are hydrocarbon substituents or R' is H, and</ListItem><ListItem>Z and Y representthe necessary atoms to close a benzene ring that may be substituted or form a fused ring system.</ListItem></UnorderedLists>