Patent ID: 8685624

Claim:
A process for flexographic printing with UV inks, which comprises A) mounting at least one flexographic printing form onto a printing cylinder, wherein the at least one flexographic printing form is obtained by a process for producing a flexographic printing form for printing with UV inks which comprises i) illuminating a photopolymerizable relief-forming layer with actinic light in accordance with an image and developing the illuminated, photopolymerizable relief-forming layer or ii) illuminating the entire area of the photopolymerizable, relief-forming layer and engraving a printing relief into the illuminated photopolymerizable relief-forming layer using a laser, wherein a photopolymerizable flexographic printing element is used, B) transferring a UV ink to the at least one flexographic printing form with an inking unit, C) transferring the UV ink from the at least one flexographic printing form to a print substrate by rotating the printing cylinder and the UV ink on the print substrate, and D) curing the print substrate with UV radiation, wherein the photopolymerizable flexographic printing element comprises at least A) a dimensionally stable support and B) a photopolymerizable, relief-forming layer comprising at least 1) from 40 to 90% by weight of a thermoplastic-elastomeric block copolymer comprising at least one block which consists essentially of alkenylaromatics and at least one block which consists essentially of 1,3-dienes, 2) from 1 to 20% by weight of ethylenically unsaturated monomers, 3) from 0.1 to 5% by weight of photoinitiator and 4) from 1 to 40% by weight of at least one plasticizer, where the amounts are in each case based on the total amount of all components of the photopolymerizable relief-forming layer, and wherein the at least one plasticizer comprises from 1 to 40% by weight of at least one cyclohexanepolycarboxylic ester of the general formula R 1 â€”(COOR 2 ) n where n is 2, 3 or 4, R 1 represents an n-valent cyclohexane radical, and R 2 represents, independently of one another, a linear, branched or cyclic, aliphatic hydrocarbon radical having from 3 to 20 carbon atoms.