Precious Metals - Sheet & Foil

Precious metal sheet is rolled down from ingots that are cast, forged and individually batch identified using a variety of melting techniques. These include air melting, melting under a specified gas, vacuum melting and electron beam melting. Vacuum cast steel rolls are employed that are regularly re-ground to ensure flatness and a consistent surface finish.

Johnson Matthey manufactures all fine foils using processes to minimize the risk of inclusions and assure artifact-free imaging. Our analytical laboratories provide the full array of analysis techniques including Spectrographic and X-ray analysis, wet chemistry techniques and Scanning Electron Microscopy for surface examination to ensure material quality.