The invention relates to a method for treating PVC plates and to plates and panels produced therefrom. The invention also relates to a plates and panels, in particular wall, ceiling or floor panels comprising a heat-treated support panel (12) based on polyvinyl chloride having a density of, in particular 900 bis 2.500 kg/m3 and a film (17) secured thereto. The film is a thin PCV film and comprises a printed decorative pattern (18) applied thereto.