A combination comprising verbascoside and luteolin, and its use in a cosmetic or pharmaceutical composition for pigmentation modulation. The method includes the use of a container, preferably a drag finishing machine to displace a workpiece or part about a substantially vertically oriented axis. The seamless filter housing 50 made with this process. The connector may be formed from a flexible material allowing movement of the aroma container relative to the clamp. Processes and materials are used which achieve desired etching at a sufficiently rapid rate such as etching to a depth of about 200 micrometers in less than about 10 hours. The surplus or residual gases are conducted via the collection line to one or more low-pressure stores and a connection line or return line is arranged from the store to the process or another treatment unit for processing the returned or collected fluid.