Sterically hindered phenolic ester photographic coupler...

Details Sterically hindered phenolic ester photographic coupler... Sterically hindered phenolic ester photographic coupler...

G - Physics

03

C

96/100

G03C 1/40 (2006.01) G03C 7/392 (2006.01)

Patent

CA 1268981

- 0 - STERICALLY HINDERED PHENOLIC ESTER PHOTOGRAPHIC COUPLER DISPERSION ADDENDA AND PHOTOGRAPHIC ELEMENTS EMPLOYING SAME Abstract of the Disclosure Photographic coupler dispersion addenda comprising phenolic esters of di-, tri- and tetra-carboxybenzene derivatives having bulky ortho substituents are described for incorporation in photographic emulsions and elements. The solvents are preferably employed in the cyan layer to protect the cyan dye against ferrous ion reduction. The solvents also provide improvements in yellow dye stability to light and cyan dye stability to light, heat and humidity.

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