Photopolymer printing form with reduced processing time
View Patent ↗The present invention is directed to an improved method of producing photosensitive printing plate blanks comprising the steps of: a) forming a first photocurable layer on a backing sheet; b) curing the first photocurable layer with actinic radiation to create a hard floor layer throughout the first photocurable layer; and c) forming a second photocurable layer on top of the cured first photocured layer that is processible by actinic radiation to form a relief image printing element. The printing plate blank having the precured floor layer may then be delivered to a print shop customer for further processing to produce a relief image printing element.
1. A method of doing business in a manufacturing facility for photocurable printing blanks, whereby a time savings and improved product is realized by the manufacturing facility and its customers, the method comprising the steps of:
a) preparing a photocurable printing blank at a manufacturing facility by a process comprising the steps of:
i) forming a first photocurable layer on a backing sheet;
ii) curing the first photocurable layer with actinic radiation to form a cured floor layer; and
iii) forming a second photocurable layer on top of the cured floor layer, wherein said second photocurable layer is capable of being cured by actinic radiation to form a relief image therein;
b) providing instructions to the consumer to establish a process at the customer's facility for producing a relief image printing element, wherein the process includes the steps of front-exposure of the photocurable printing blank and developing the photocurable printing blank to create the relief image printing element but does not include a back exposure step;
c) providing the photocurable printing blank having the cured floor layer formed therein to the customer, wherein the customer performs steps to front-expose and develop the second photocurable layer of the printing plate blank to form the relief image in the second photocurable layer but does not back expose the photocurable printing blank.
2. The business method of claim 1 , wherein the backing layer comprises polyethylene terephthalate.
3. The business method of claim 2 , wherein the first photocurable layer is deposited on the backing layer without the use of an adhesive.
4. The business method of claim 1 , wherein the customer is provided with options for ordering printing blanks of a desired size and thickness.
5. The business method of claim 1 , wherein the step of curing the first photocurable layer with actinic radiation is performed under vacuum.