MANUFACTURE OF FINELY PERFORATED SHEET MATERIAL

摘要

A method of perforating a sheet material (11) comprising removably supporting the sheet material (11) on a support surface of a support body (12), exposing the sheet material to a laser beam (16) to form perforations in the sheet material (11) and removing the resultant perforated sheet material (11) from the support body (12). The support surface has a low reflectivity to the laser beam such that the geometry of the perforations is not significantly affected by reflected radiation.