Recording medium and method of making

US4272602A · kind A · utility

Assignee

• AGFA-Gervaert AG · DE

Inventors

• Otto Stemme · Munich, DE
• Frank Staudacher · Haan, DE

Key dates

• Filing date: Sep 10, 1979
• Grant date: Jun 9, 1981
• Expiry date: Sep 10, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/90
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Recording medium for photographic prints comprising a magnetizable layer on the rear side of a photographic material which is preferrably paper based, the magnetizable areas having different surface roughnesses. This medium allows recording of sound information or codes on the prints and reproduction in recorders or by monitoring.