Method of making copies of information tracks on carriers

Details Method of making copies of information tracks on carriers Method of making copies of information tracks on carriers

G - Physics

03

C

96/232, 96/269

G03C 5/00 (2006.01) G03C 1/62 (2006.01) G03C 5/58 (2006.01) G11B 7/28 (2006.01)

Patent

CA 1119451

ABSTRACT: Photographic copying of plates having coded video and audio information of a very fine structure. Use is made of aromatic diazosulphide as a photosen- sitive system in which after exposure a metal nuclei image is produced by contact with metal salt, which image is intensified by physical development to a metal image having a density below D = 1. - 13 -

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