Process for the exposure and development of photo-graphic images and an apparatus for carrying out the process

US4508809A · kind A · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Immo Boie · Cologne, DE
• Hermann Luhrig · Leverkusen, DE
• Guido Kovacic · Unkel, DE

Key dates

• Filing date: May 23, 1983
• Grant date: Apr 2, 1985
• Expiry date: May 23, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G03D13/04
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

In a process and an apparatus for the exposure and development of photographic images according to the dye diffusion process a monosheet material is used, the laminated structure of which is divided by a layer which is impermeable to light but permeable to moisture into a photosensitive side of the sheet for image-wise exposure and a non-photosensitive side for observation and supplying the activator or developer solution. The said monosheet material is exposed image-wise in the dark and the photosensitive side then sealed in a light and moisture proof manner in a development apparatus in which the non-photosensitive side of the monosheet lies open and is exposed to an activator in daylight so that the image formation takes place visibly. Once the image quality has been achieved the development is stopped by removing the activator and by subsequent rinsing. The monosheet is dried in a conventional manner but only on one side.