Photographic sound reproduction using silver diffusion transfer

Details Photographic sound reproduction using silver diffusion transfer Photographic sound reproduction using silver diffusion transfer

1977-12-27

1979-02-13

Schilling, Richard L.

Gas separation: apparatus

Magnetic separating means

And electric field separation apparatus

96 4, 96 29R, 96 39, 96 76R, 274 5R, 274 416R, 274 416PP, 352 26, 352 27, G03C 724, G03C 700, G03C 514, G11B 724

Patent

active

041393821

ABSTRACT:
A photographic sound recording and reproduction method is disclosed wherein a sound track is formed by silver diffusion transfer processing. Film units suitable for this application are described which comprise a support, a layer containing silver precipitating nuclei, and a layer containing photosensitive silver halide crystals.
In one embodiment, a photographic sound track may be produced in a silver diffusion transfer color motion picture film unit, which further comprises an optical color screen.

REFERENCES:
patent: 2861885 (1958-11-01), Land
patent: 3536488 (1970-10-01), Land
patent: 3615426 (1971-10-01), Debruyn
patent: 3615427 (1971-10-01), Debruyn
patent: 3615428 (1971-10-01), Weed
patent: 3615429 (1971-10-01), Weed
patent: 3677753 (1972-07-01), Francis et al.
patent: 3894871 (1975-07-01), Land
Glafkieles, P., Photographic Chemistry, Foundation Press, London, 1958, pp. 261-265.

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