copper - lined laminates are formed by galvanically depositing a copper layer on a portion of at least one of two endless press bands arranged to define a reaction zone between two generally parallel sides thereof . after depositing of the copper layer , the press bands are moved through the reaction zone and resin impregnated plastic webs are also moved between the press bands in the reaction zone to form a laminated structure which is then stripped from the press bands to form the copper - lined laminates .