Color negative film

US6060227A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Ralf Buscher · Lohmar, DE
• Peter Bell · Neunburg vorm Wald, DE
• Hans-Ulrich Borst · Elsdorf, DE
• Lothar Rosenhahn · Neunburg vorm Wald, DE
• Jorg Siegel · Leverkusen, DE
• Thomas Stetzer · Langenfeld, DE

Key dates

• Filing date: Jul 24, 1998
• Grant date: May 9, 2000
• Expiry date: Jul 24, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/16
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A color negative film having a support, at least one blue-sensitive, yellow-coupling silver halide emulsion layer, at least one green-sensitive, magenta-coupling silver halide emulsion layer and at least one red-sensitive, cyan-coupling silver halide emulsion layer, wherein at least one of the color-sensitive silver halide emulsion layers consists of at least two sub-layers of differing photographic sensitivity, the coupler application rate in the most highly sensitive layer of the color sensitive silver halide emulsion layer, of which there is at least one, consisting of at least two sub-layers of differing photographic sensitivity, is no more than 0.05 mmol/m.sup.2 and a development-promoting compound or a compound from the range of ETAR couplers and ACR couplers is used in the same or an adjacent layer, which compound, on reaction with the developer oxidation product (DOP), releases a development-promoting compound from the range of electron transfer agents (ETAR) or of binding groups having an affinity for silver (ACR), is distinguished by an improved grain/sensitivity ratio.