| 摘要 |
<p>Method of treating a dye image in photographic material which dye image has been formed by the colour coupling reaction of a primary aromatic amine colour developing agent with a phenolic colour coupler of the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="25" wi="27" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>where T is hydroxy or amino, one of R<Sub>1</Sub> and R<Sub>3</Sub> is the coupling position and if it is the coupling position the substituent group is hydrogen or halogen, a nitrogen-linked heterocycle or a mercapto group, the other of R<Sub>1</Sub> and R<Sub>3</Sub> and R<Sub>2</Sub> and R<Sub>4</Sub> are each hydrogen or halogen or optionally substituted organic groups, or one of R<Sub>1</Sub> and R<Sub>2</Sub> together or R<Sub>2</Sub> and R<Sub>3</Sub> together may represent the atoms necessary to complete a benzannelated ring, which treatment method comprises treating the dye image with an aqueous solution which comprises a salt of a transition (b-sub group) metal, the concentration of the metal ion in the aqueous solution being at least 10-<Sup>4</Sup>M.</p><p>With this method the spectral absorption range of dye images formed by the above phenolic or naphtholic coupler compounds can be increased or altered. Further the resistance of these dye images to fading by actinic light can be increased over a long period.</p> |
