Positive-working photographic process and radiation elements uti

Details Positive-working photographic process and radiation elements uti Positive-working photographic process and radiation elements uti

1976-01-06

1978-02-21

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

204 15, 204 38B, 427343, 96 76R, G03C 524, G03C 148

Patent

active

040750167

ABSTRACT:
Radiation sensitive elements comprising a thin radiation sensitive layer of an amorphous chalcogenide of arsenic adhering to a substrate are utilized in the production of latent images when exposed to a suitable form of radiation, the latent images being developed by utilizing the inability of radiation exposed arsenic chalcogenide to cause reduction of noble metal salts. Noble metal salts are thus decomposed by arsenic chalcogenide which has not been exposed to radiation to form a direct positive image which can subsequently be intensified by physical development and/or electroless deposition of metal possibly followed by electrolytic deposition of metal. The form of radiation employed is generally visible light and diverse procedures for producing direct positive images are disclosed.

REFERENCES:
patent: 3658540 (1972-04-01), Malinowski
patent: 3707372 (1972-12-01), Hallman et al.
patent: 3829317 (1974-08-01), Case
patent: 3907566 (1975-09-01), Inoue et al.
patent: 3923512 (1975-12-01), Berkes et al.
patent: 3933496 (1976-01-01), Kolev et al.

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