Patent ID: 7691550
Filing Date: 2010-04-06
Classification: B41C,G03F,Y10S

Abstract:
1. A method for making a printing form having a desired cure response, Rc, comprising: a) providing a photosensitive element having a layer of a photopolymerizable composition comprising an elastomeric binder, a monomer, and a photoinitiator capable of activation by actinic radiation; b) providing a source of the actinic radiation having an emission spectra and a peak emission; c) measuring intensity of the source using a sensor having an absorption peak matched to the peak emission of the source of actinic radiation; d) conducting a step exposure test comprising: e) creating a polymerization rate curve for the photosensitive element of the cure response versus energy density that is determined by the intensity of step c) multiplied by the times T f) providing a second photosensitive element having a layer of the composition comprising the elastomeric binder, the monomer, and the photoinitiator; and g) exposing the second element to the source of the actinic radiation based on an energy density determined from the polymerization rate curve generated in step e) to form polymerized portions having the desired cure response Rc.