For this method, PMMA plates (polymethylmethacrylate) with one side of the substrate roughened, have proven to be satisfactory. The topography of the recommended PMMA plates has been characterized by 6 roughness parameters and the resulting targets and upper / lower limits of these parameters are described in Appendix III.
The size of the substrate should be chosen such that the application area is not less than 16cm² and a square shape is preferred.