Yellow 2:1 azo-azo or azo-azomethine chrome complexed dye developers
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United States of America Patent
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Jan 27, 1981
Issued Date -
N/A
app pub date -
Aug 2, 1978
filing date -
Aug 2, 1978
priority date (Note) -
Expired
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Abstract
Novel yellow 2:1 azo-azo or azo-azomethine chrome complexed dye developer particularly useful in diffusion transfer photographic products and processes are presented by this invention. The novel 2:1 chrome complexed dye developers have the following structure: ##STR1## where each A is a phenyl radical; each B is a phenyl or nitrogen containing heterocyclic radical; Y is a silver halide developing substituent; each n is 0 or 1 but at least one n must be 1; R is N or CH; R.sup.1 is ##STR2## if R is N but R.sup.1 is --O-- if R is CH and X is a cation.
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