Gas separation: apparatus – Electric field separation apparatus – Electrode retaining or supporting means
Patent
1977-02-14
1978-06-13
Louie, Jr., Won H.
Gas separation: apparatus
Electric field separation apparatus
Electrode retaining or supporting means
96 88, G03C 152
Patent
active
040946762
ABSTRACT:
A novel non-silver salt type photosensitive composition which comprises (A) N,N'-diphenyl-p-phenylenediamine as a color developing agent and tetramethylthiuram disulfide which unexpectedly functions rather as another color developing agent than as a storage stabilizer, (B) an organic halide compound as a photoactivator, (C) a salicylic acid derivative as a storage stabilizer for an unexposed photosensitive material, (D) thiourea which functions rather as an agent capable of functioning as both an anti-foggant at and after image formation and a contrasting agent than as a storage stabilizer, and (E) at least one member selected from the group consisting of (i) 2-methylindole, (ii) 2-mercaptothiazoline and (iii) p-diethylaminobenzaldehyde as a color tone adjusting agent. A photosensitive material or film obtained from the present photosensitive composition has an excellent storage stability in the unexposed state, and can give, only by dry process, a blackish brown image having a high photographic density and a high contrast, with fog occurrence reduced.
REFERENCES:
patent: 3042516 (1962-07-01), Waiver
patent: 3164467 (1965-01-01), Sprague et al.
patent: 3775123 (1973-11-01), Takano et al.
Ito Yoshinobu
Matsushika Tadao
Naka Hiroshi
Takano Hiroshi
Yoshino Masatsugu
Asahi Kasei Kogyo Kabushiki Kaisha
Louie, Jr. Won H.
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