Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1989-06-02
1990-10-23
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430264, 430302, 430331, 430463, 101466, G03C 554
Patent
active
049651684
ABSTRACT:
A silver master plate recovery solution for a silver salt photographic plate for offset printing is disclosed which comprises (a) a hydrazine component for reducing the silver oxide layer of an image area, (b) a quaternary ammonium salt cationic activator and (c) water. The mixing ratio of the quaternary ammonium salt cationic activator is 3.0 to 20.0 wt % on the basis of the hydrazine component. The silver master plate recovery solution reduces the silver oxide layer of the image area of a silver salt photographic plate which has passed the stock time, thereby recovering the ink receptivity of the image area.
REFERENCES:
patent: 3378372 (1968-04-01), Vandeputte et al.
patent: 3819374 (1974-06-01), Kemp
patent: 3832175 (1974-08-01), Kemp
patent: 4358530 (1982-11-01), Shiba
Kainuma Osamu
Kamada Tokuichi
Yoshida Hajime
Le Hoa V.
Michl Paul R.
Nikken Chemical Laboratory Co., Ltd.
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