Method for the production of a flexographic plate and...

Details Method for the production of a flexographic plate and... Method for the production of a flexographic plate and...

G - Physics

03

F

G03F 7/24 (2006.01) G03F 7/18 (2006.01) G03F 7/20 (2006.01) G03F 7/36 (2006.01)

Patent

CA 2472315

The invention relates to a method for producing a flexographic plate comprising a base layer and a layer of photosensitive material fixed on the base layer. According to the inventive method, an image is produced on the photosensitive layer by means of selective reticulation, whereby the areas to be reticulated are exposed to light of a predefined wavelength and the non-reticulated areas are removed. The inventive method is characterized by the use of amplitude-modified laser light with a wavelength ranging from 390 to 410, which scans the surface of the photosensitive layer. The inventive method can be used to produce flexographic plates.

L'invention concerne un procédé de fabrication d'une plaque de flexographie comportant une couche de base et une couche d'un matériau photosensible fixé sur la couche de base. Le procédé est du type selon lequel on produit une image sur la couche photosensible en provoquant une réticulation sélective par insolation des zones à réticuler par la lumière d'une longueur d'ondes prédéterminée et par enlèvement des zones non réticulées. Le procédé est caractérisé en ce que l'on utilise pour l'insolation une lumière laser, modulée en amplitude, dont la longueur d'ondes est de l'ordre de 390 à 410 nm et qui est amenée à balayer la surface de la couche photosensible. L'invention est utilisable pour la fabrication de plaques de flexographie.

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