Abstract: The invention relates to a method of reproducing plastics record carriers, in particular duplicating video records. According to the invention, a metal die is used which is provided with a thin-liquid molding resin of a particular composition which can be polymerized by radiation. A radiation-pervious substrate which is manufactured from synthetic material, for example polymethylmethacrylate, is provided on the molding resin. The molding resin is exposed to light via the substrate after which the cured molding resin together with the substrate connected thereto is removed from the die. The molding resin used in the process comprises low-molecular monomers or oligomers which contain on an average 25-70% by weight of hydrocarbon groups and/or phenyl groups. The molding resin is aprotic and has a functionality as regards unsaturatedness which is between the values 2 and 6. A suitable molding resin contains mono-, tri- or tetra esters of acrylic acid.

Abstract: Bake out is accelerated and made possible at a lower temperature when at least one metal organic compound defined by the general formulaM R.sub.nin whichM=V.sup.III, Mn.sup.II, Mn.sup.III, IN.sup.III, Ca, Co.sup.III, Ni.sup.II (VO).sup.II or (VO).sup.IIIn=2 or 3R=an organic residue of the compound classes of polyunsaturated compounds, aminoalcohols, aminoacids, carboxylic acids, hydroxycarboxylic acids, mercaptocarboxylic acids, enolisable ketones, ketoximes, aldoximes, amines, and phosphineswhich is capable of changing into an oxide of M when heated to 150.degree. to 420.degree. C. is dissolved in the starting mixture or added to the starting mixture in the form of a solution.

Abstract: The invention relates to a method of reproducing plastics record carriers, in particular duplicating video records. According to the invention, a metal die is used which is provided with a thin-liquid molding resin of a particular composition which can be polymerized by radiation. A radiation-pervious substrate which is manufactured from synthetic material, for example polymethylmethacrylate, is provided on the molding resin. The molding resin is exposed to light via the substrate after which the cured molding resin together with the substrate connected thereto is removed from the die. The molding resin used in the process comprises low-molecular monomers or oligomers which contain on an average 25-70% by weight of hydrocarbon groups and/or phenyl groups. The molding resin is aprotic and has a functionality as regards unsaturatedness which is between the values 2 and 6. A suitable molding resin contains mono-, tri- or tetra esters of acylic acid.

Abstract: The invention relates to an information disc having a laminated structure which can be read optically. The information disc comprises a transparent substrate which is preferably manufactured from a synthetic resin, for example plexiglass, having thereon a radiation-cured lacquer layer in which the information track is present. The lacquer layer used comprises a radiation-cross linkable protic compound which after curing is aprotic. The lacquer layer preferably comprises a polythiol compound as well as a polyene compound in an equivalent ratio of 1:1.

Abstract: The invention relates to a disk-shaped record carrier, for example a video plate, which is provided on one side or on both sides with a radiation-reflecting surface structure in the form of an information track consisting of blocks and pits on which a reflecting layer of metal is provided. The plate can be read optically. According to the invention the reflecting metal layer is provided with a cover layer which is formed by a transparent plate which is connected to the metal surface by means of a radiation-curable lacquer. The lacquer is preferably a U.V. curing lacquer and contains a protic mixture of acrylic acid esters. The transparent plate is also preferably manufactured from a transparent synthetic resin and has a thickness of 200 .mu.m.