... PVC materials. PVC expansion boards have smoothing surface, printing is available. (Surface should be cleaned before printing). Purposes: ... : halftone printing, computer lettering, ad scutcheon, exhibition board, remark board; industrial application: antisepsis project, thermal moulding parts, boards ... free style expansion boards: item, unit, result, surface density, g/cm3 0.5-0.8, tensile strength ...