The production of special chemicals is a complex process that requires a reat deal of experience. The German company AllessaChemie, which is based in Frankfurt am Main, makes use of a broad selection of gases to give effective support to its manufacturing operations, in particular inert welding gases for plant maintenance. For analysis purposes, scientists at AllessaChemie employ a selection of pure gases and test gases. Messer supplies the full range of bottled gases to 200-bar or 300-bar specification. From next autumn, AllessaChemie will also be ordering liquid nitrogen from Messer.