Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1995-12-12
1998-02-17
Chea, Thorl
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430233, 430256, 4302721, 430617, 430465, G03C 800, G03C 1494
Patent
active
057190054
ABSTRACT:
A method is disclosed for the the formation of a photo mode image based on a the introduction on exposure of a difference of tackiness in a photosensitive layer which contains a reducible silver salt such as silver behenate. After exposure the still tacky parts selectively take up a reactive toner containing a reducing agent. By means of a heat post-treatment density is built up by reduction of the organic silver salt. This density can be increased by the presence in the toner of a pigment, preferable carbon black. In this way high maximal densities can be obtained. In a preferred embodiment the difference in tackiness is introduced by image-wise photopolymerization of a monomer also present in the photosensitive layer.
REFERENCES:
patent: 3218166 (1965-11-01), Reitter
patent: 5395730 (1995-03-01), Podszun et al.
Daems Eddie
Leenders Luc
Agfa-Gevaert N.V.
Chea Thorl
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