The metal sheets are sprayed with an etchant to dissolve the exposed metal. Only those areas which are protected by the coating remain intact. In this way, the part attains the desired contours. This process used does not damage the surrounding material in any way, and results are guaranteed 100% burr-free.
Special feature: Slightly etched bending edges
If a contoured part is only protected on one side by the coating, the etchant only etches one side at this point. This creates an indentation which can serve, for example, as a bending edge during further processing.