Positive-working immobile photographic compounds and...

Details Positive-working immobile photographic compounds and... Positive-working immobile photographic compounds and...

C - Chemistry, Metallurgy

09

B

260/171, 96/275

C09B 29/00 (2006.01) G03C 1/10 (2006.01)

Patent

CA 1057744

Abstract of the Disclosure Photo?raphic elements, processes for forming images in photographic elements and new compounds are disclosed. Gener- ally, the invention relates to immobile compounds which can be used to provide positive images from negative recording-develop- ing photographic materials such as negative silver halide emul- sions. The compounds contain a photographically useful group such as a dye or dye precursor and are capable or releasing said photographically useful group under alkaline conditions, and are also capable of reaction with an imagewise pattern of oxidized silver halide developing agent before substantial release of said photographically useful group occurs, to provide a reaction product having a substantially lower rate of release of said photographically useful group.

310053

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