Abstract: The invention relates to a synthetic resin sheet manufactured from a first thermoplastic synthetic resin comprising a coating layer from a thermoplastic synthetic resin composition, comprising a second thermoplastic synthetic resin, a polyacrylate with free, reactive hydroxyl groups and--per 100 parts by weight of the second thermoplastic synthetic resin--from 1 to 6% by weight of electrically conductive carbon black. The side of the synthetic resin sheet on which the coating layer has been provided, has an accurate and reproducibly adjustable surface resistivity from 100,000 to 100,000,000,000 Ohms per square. The synthetic resin sheet together with the coating layer provided thereon may be formed to articles by means of thermoforming. The surface resistivity remains substantially unchanged by the thermoforming.

Abstract: The invention relates to a method with which an auxiliary substance is provided in the surface of articles having a polycarbonate surface layer. For this purpose the surface to be treated is contacted with the auxiliary substance and a cyclic ketone compound, preferably cyclohexanone. The auxiliary substance may be, for example, a UV-absorption agent or a pigment.