Patent ID: 6261759
Filing Date: 2001-07-17
Classification: G03C

Abstract:
A method of making a silver halide emulsion having reduced wet abrasion sensitivity, the emulsion being greater than 50 mole % silver chloride, comprisinga) precipitating and chemically sensitizing the emulsion;b) adding to the emulsion either before or during the chemical sensitization a dithiolone compound represented by Formula (A): ##STR20##wherein b is C(O), C(S), C(Se), CH.sub.2 or (CH).sub.2 and R.sup.1 and R.sup.2 are independently H, or aliphatic, aromatic or heterocyclic groups, alkoxy groups, hydroxy groups, halogen atoms, aryloxy groups, alkylthio groups, arylthio groups, acyl groups, sulfonyl groups, acyloxy groups, carboxyl groups, cyano groups, sulfo groups, or amino groups, or R.sup.1 and R.sup.2 together represent the atoms necessary to form a substituted or unsubstituted five or six-membered ring or a multiple ring system; and q is 1 or 2; and an effective amount of a first mercapto azole compound independently represented by Formula B: ##STR21##wherein Q represents the atoms necessary to form a substituted or unsubstituted five or six-membered heterocyclic ring containing at least one nitrogen atom, and M is a cation; andc) after the completion of chemical sensitization, adding to the emulsion an effective amount of a second mercapto azole compound independently represented by Formula (B).