METHOD FOR FORMING A PATTERNED PHOTOPOLYMER COATING ON A PRINTING ROLLER AND ALSO A PRINTING ROLLER WITH PATTERNED PHOTOPOLYMER COATING

摘要

AbstractThe invention relates to a method of forming of a patternedphotopolymer coating on a printing roller in which aphotopolymer coating, present on said roller, and coveredby a light-sensitive intermediate layer is exposed in afirst stage to form an image of opaque and translucent partsin said intermediate layer.Subsequently the photopolymer layer is exposed via theimage formed in the intermediate layer, after which thephotopolymer layer is developed.Between abovementioned exposures, in case of a relativelythick, flexible, photopolymer, a period is waited to ensurethat depressed parts of the photopolymer layer havereturned to their original state.The invention also relates to a printing roller thusobtained.