Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1990-05-17
1991-11-05
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430233, 430249, 430251, 430449, 430455, 430456, 430486, 430487, 430490, 430492, 430965, G03C 554, G03C 546
Patent
active
050631365
ABSTRACT:
An aqueous alkaline processing liquid suitable for use in the silver complex diffusion transfer (DTR-) process, wherein said liquid contains one or more alkanolamines, the said alkanolamine(s) consisting of one or more tertiary alkanolamines in an amount in the range from 0.15 mol to 1.5 mol/l, and one or more secondary alkanolamines in an amount higher than 5 mol % but not higher than 100 mol % with respect to the amount of tertiary alkanolamine(s), and said liquid also contains a mixture of a silver image toning agent A being 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof and at least one other silver image toning agent B being a 1-phenyl-1H-tetrazole-5-thiol or a tautomer thereof, wherein the phenyl nucleus is substituted with halogen, the toning agent A and toning agent(s) B being present in said liquid in a molar ratio from 1/15 to 15/1.
REFERENCES:
patent: 3576633 (1971-04-01), Henn et al.
patent: 4568634 (1986-02-01), Hayashi
patent: 4632896 (1986-12-01), Tsubai et al.
patent: 4649096 (1987-03-01), Tsubai et al.
De Brabandere Luc A.
De Keyzer Rene M.
Odeurs Raymond L.
Agfa-Gevaert N.V.
Schilling Richard L.
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