Patent ID: 6689549
Filing Date: 2004-02-10
Classification: G03C

Abstract:
A photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a cyan â€œNB couplerâ€  having the formula: wherein:the term â€œNB couplerâ€  represents a coupler of formula (I) that forms a dye with the developer 4-amino-3-methyl-N-ethyl-N-(2-methanesulfonamidoethyl) aniline sesquisulfate hydrate for which the left bandwidth (LBW) using spin-coating is at least Snm less than that of the same dye in solution form; V is a sulfone, sulfoxide or sulfonamide-containing group; Y is H or a coupling-off group; each Z1, Z2, Z3 and Z* are an independently selected substituent group where p is 0 to 2; provided that Z1 and Z2 or Z2 and Z3 can join to form a ring; provided further that Z1 and Z2 do not join to form an aromatic or heterocyclic ring; and provided firther that the combined sum of the aliphatic carbon atoms in V, all Z1, Z2, Z3 and all Z* is at least 8.