A process for detackifying an imagewise exposed and solvent-developed photopolymeric flexographic relief pprinting plate prepared from a photosensitive elastomeric composition containing an ethylenically unsaturated photopolymerizable monomer or oligomer having at least one terminal ethylenically unsaturated group; a photoinitiator or photoinitiator system; and a solventsoluble elastomeric binder comprising polymerized conjugated diene monomers. The process comprises the steps of: a) drying the plate after development, and b) exposing the printing surface to radiation with wavelengths in the range of 200 to 300 nm. The improvement comprises: applying an aprotic organic solvent to the surface of the plate, after step a) and before step b) above.
PROCESS FOR DETACKIFYING PHOTOPOLYMER FLEXOGRAPHIC PRINTING PLATES