Color transfer photographic processes and products

Details Color transfer photographic processes and products Color transfer photographic processes and products

C - Chemistry, Metallurgy

07

D

96/36, 260/306.1

C07D 405/14 (2006.01) G03C 1/06 (2006.01) G03C 1/40 (2006.01) G03C 8/48 (2006.01)

Patent

CA 1266051

ABSTRACT OF THE DISCLOSURE This invention relates to diffusion transfer photographic processes adapted to be performed in the presence of ambient light and to diffusion transfer products useful in such processes wherein enhanced opacification particularly, in the green region of the visible spectrum is achieved by employing a 7- sulfonamido/5- or 6-sulfamoyl indole phthalein of the formula Image wherein R is selected from alkyl, aryl, aralkyl and alkaryl, R' and R" each are selected from hydrogen, halo and -SO2NR1R2 provided one of said R' and R" is said -SO2NR1R2, R1 and R2 each are selected from hydrogen, alkyl, aryl, aralkyl and alkaryl, and X represents the carbon atoms necessary to complete phthalide or naphthalide, as the light-absorbing, pH-sensitive optical filter agent for the shorter wavelength region of the visible spectrum.

512866

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