Abstract: A liquid photopolymerizable composition, according to the invention, consists of methyl methacrylate, benzoin or benzoin ethers, a photopolymerizable component--an oligocarbonate methacrylate or a mixture thereof with an oligoester acrylate or oligoester maleinate at a weight ratio of these oligomers in the mixture of 1:1, the components being taken in the following proportions (in % by weight):methyl methacrylate: 5-10benzoin or benzoin ethers: 0.1.0photopolymerizable component: the balanceLight sensitivity of this composition is up to 981 J/m.sup.2 in terms of exposure H at d=1 mm (wherein d is the thickness of a photopolymeric layer obtained by acting with UV-radiation on the composition; the radiation source - luminescent UV-lamps of 80 W total output. Printing forms made on the basis of this composition exhibit improved physical and mechanical properties. Thus, tensile strength of the printing forms is as high as 5.25 kgf/mm.sup.2 and durability, up to 1 million impressions.

Abstract: An adhesive antihalation composition for making metal-backed photopolymeric printing forms, according to the invention, consists of an adhesive comprising a product of copolymerization of diphenylol-propane epoxy resin with a molecular weight from 360 to 3000 and phenol-formaldehyde novolac resin with a molecular weight from 400 to 1000 in a weight ratio of 1:1 in the product, an antihalation component - iron oxide or chromium oxide, a solvent - a mixture of ethanol and acetone, the above components being used in the composition in the following proportions (in % by weight):antihalation component:10-15adhesive:35-45solvent:55-40.This composition is simple, free from toxic substances and stable during storage. When used, it ensures high adhesion of printing elements to a metal support, as high as 300-320 kfg/cm.sup.2.