Diffusion transfer material.

摘要

A photographic silver halide material comprising a compound which is capable of being reduced by a silver halide developing agent at a rate slower than that of image-wise developable silver halide and in reduced state is capable of releasing a photographically useful group, characterized in that said compound corresponds to the following formula :
<Chemistry id="chema01" num="0001"><Image id="ia01" he="20" wi="60" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein :
<UnorderedLists id="ula01" listStyle="none"><ListItem>R<Sup>10</Sup> and R<Sup>20</Sup> (same or different)
<UnorderedLists id="ula02" listStyle="none"><ListItem>(1) represent an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group or an aralkyl group including said groups in substituted form,</ListItem><ListItem>(2) represent an aryl group including a substituted aryl group, or</ListItem><ListItem>(3) represent a heterocyclic ring residue including such residue in substituted form or</ListItem></UnorderedLists></ListItem><ListItem>R'° and R<Sup>20</Sup> are ringclosed, either R'° or R<Sup>20</Sup> containing a ballasting group conferring diffusion resistance to the com- pond in hydrophilic colloid media when penetrated by an aqueous alkaline liquid;</ListItem><ListItem>L' and L<Sup>2</Sup> (same or different) represent a
<Chemistry id="chema02" num="0002"><Image id="ia02" he="10" wi="25" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>NHCO-:
<Chemistry id="chema03" num="0003"><Image id="ia03" he="14" wi="64" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>group;</ListItem><ListItem>p and q (same or different) represent an integer 0 or 1;</ListItem><ListItem>Z represents an atom or an atom group which is electronegative with respect to carbon, and</ListItem><ListItem>PUG represents together with Z a releasable photographically useful group.</ListItem></UnorderedLists>