Filter dyes for photographic elements

Details Filter dyes for photographic elements Filter dyes for photographic elements

1996-06-28

1998-11-10

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430510, 430511, 430517, G03C 106, G03C 1815, G03C 1825

Patent

active

058341730

ABSTRACT:
A photographic element contains a dye of Formula (I): ##STR1## wherein G represents O or dicyanovinyl (--C(CN).sub.2); E.sup.1 represents an electron withdrawing group; R.sup.1 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted hetereoaryl group; L.sup.1, L.sup.2 and L.sup.3 each independently represent substituted or unsubstituted methine groups; Z represents non-metal atoms which may be assembled to form a five- or six-membered heterocyclic ring other than furan; and n represents 0 or 1; and wherein the dye comprises at least one ionizable group with a pKa value between 4 and 12.

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