Microcapsule imaging system having improved dynamic range

US4840866A · kind A · utility

Assignee

• The Mead Corporation · US

Inventors

• Kerry Kovacs · Centerville, US
• William H. Simpson · Pittsford, US
• Amy L. Burkholder · Chillicothe, US
• Russell K. Messer · Kettering, US
• Teresa M. Thomas · Springfield, US

Key dates

• Filing date: Mar 24, 1988
• Grant date: Jun 20, 1989
• Expiry date: Mar 24, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/128
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A photographic material exhibiting improved photographic characteristics comprising a photographic material comprising a support having a layer of microcapsules thereon, and an image-forming agent being associated with said microcapsules, said microcapsules including a mixture of a first subset of microcapsules and a second subset of microcapsules, said first and second subsets of microcapsules being associated with an image-forming agent for the same color, and said first subset of microcapsules providing a higher film speed than said second subset of microcapsules when said first and second subsets of microcapsules are exposed to a broad band white light source and developed under identical conditions.