Chemical imaging of a lithographic printing plate

Details Chemical imaging of a lithographic printing plate Chemical imaging of a lithographic printing plate

B - Operations, Transporting

41

C

B41C 1/10 (2006.01) B05D 1/36 (2006.01) B44C 1/22 (2006.01) G03F 1/00 (2006.01) G03F 7/20 (2006.01) G03F 7/38 (2006.01)

Patent

CA 2408600

A process for forming a lithographic printing plate (6) with a latent image (8), wherein the printing plate having a coating containing diazo resins. An ink jet printer is used to apply micro drops of a basic chemical solution that insolubilizes the affected areas of the coating to a developing solution. The latent image may be cured by heating the plate for a short period of time, is then developed to form the image (10). The process works with conventional, commercially available lithographic plates and developers.

Procédé servant à créer une image latente (8) sur une plaque d'impression lithographique pourvue d'un revêtement contenant des résines diazoïques. On utilise une imprimante à jet d'encre afin d'appliquer des micro-gouttes de solution chimique basique insolubilisant les zones touchées du revêtement à une solution révélatrice. On peut durcir l'image latente par réchauffement de la plaque pendant une durée limitée et on la développe afin d'obtenir l'image (10). Ce procédé s'applique à des plaques lithographiques et à des révélateurs classiques vendus dans le commerce.

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