Reduced fog in photographic coatings containing a monosubstituted quinone

US6309813A · kind A · utility

Assignee

• EASTMAN KODAK COMPANY · US

Inventors

• Janet N. Younathan · Fairport, US
• Daniel L. Kapp · Rochester, US
• Stephen P. Singer · Spencerport, US
• David Foster · Woodstock, GB

Key dates

• Filing date: Dec 15, 2000
• Grant date: Oct 30, 2001
• Expiry date: Dec 15, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G03C7/39232
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer containing an azopyrazolone masking coupler and a monosubstituted quinone of formula I: ##STR1## wherein R is selected from the group consisting of alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, sulfinyl, sulfonyl,sulfamoyl, halogen, cyano, thiol, hydroxy, nitro, acyloxy, sulfonyloxy, heterocyclic, carboxylic acid, carboxylate, carbamoyl, amino, carbonamido and sulfonamido groups.