Photographic silver halide element containing microprecipitated

Details Photographic silver halide element containing microprecipitated Photographic silver halide element containing microprecipitated

1993-10-08

1994-07-05

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430510, 430517, 5483654, G03C 184

Patent

active

053266870

ABSTRACT:
A microprecipitated dispersion comprising a methine oxonol filter dye is provided which has the formula ##STR1## wherein n is 0, 1, or 2; R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are the same or different substituted or unsubstituted alkyl or aryl groups, one or more of R.sub.1, R.sub.2, R.sub.3, and R.sub.4 contains carboxy substituent --CO.sub.2 Z, wherein Z.sup.+ is a statistical mixture of hydrogen (H.sup.+) and alkali or tetraalkylammonium cations (M.sup.+) such that Z.sup.+ =xH.sup.+ +(1-x)M.sup.+, where x is a decimal ranging from about 0.33 to about 0.95, and photographic elements containing them.

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