Method for use formation of an improved image
AssigneeAgfa-Gevaert
InventorsRudolf Van den Bergh, Johan Lamotte, Andr e Bellens
Life of this patent
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Abstract
A method for exposing a radiation sensitive material is disclosed comprising a double-sided laser exposure of the same information in register on both sides. In a preferred embodiment this material is a thermal imaging medium comprising a support, an image forming layer preferably containing carbon black, a release layer and an adhesive layer. By laser exposing this medium in register on both sides a heat mode image can be obtained after lamination and delamination which shows practically no pinhole defects.
Claims11
Method of information-wise exposing by means of laser radiation a radiation sensitive material comprising a transparent support and on one side thereof at least one radiation sensitive layer comprising one or more compounds capable of producing information-wise differentiation between the exposed and non-exposed areas of said material, characterized in that the same information is recorded by simultaneous or consecutive exposure in register on both sides of said radiation sensitive material.
Method for the formation of a heat mode image comprising the following steps:
- (A) providing a thermal imaging medium comprising:
- (1) a transparent support having a surface part liquefiable by intense heat,
- (2) an image forming layer containing an image forming substance and a compound capable of transforming laser radiation into heat, said compound being the same or different from said image forming substance,
- (3) a release layer,
- (4) a permanent or thermal adhesive layer,
- (B) either,
- (i) recording by simultaneous or consecutive exposure by means of a laser the same information in register on both sides of the thermal imaging medium, (ii) laminating a stripping sheet on top of said adhesive layer (4), and (iii) peeling-apart said support and said stripping sheet whereby the image forming layer and at least part of the release layer adhere to the support in the information-wise exposed parts, and whereby the image forming layer, the release layer and the adhesive layer adhere to the stripping sheet in the information-wise non-exposed parts, so that a negative image is formed on said support,
- or,
- (i') laminating a transparent stripping sheet on top of the adhesive layer, (ii') recording by simultaneous or consecutive exposure by means of a laser the same information in register on both sides of said thermal imaging medium, and (iii') peeling-apart said support and said stripping sheet whereby the image forming layer and at least part of the release layer adhere to the support in the information-wise exposed parts, and whereby the image forming layer, the release layer and the adhesive layer adhere to the stripping sheet in the information-wise non-exposed parts, so that a negative image is formed on said support.
Dependencies are inferred from the claim text.