News Release

Clark Manufacturing Develops Direct Oxidation Technology for Producing Bismuth Oxide

10/14/2003

Newman Lake, WA—Clark Manufacturing LLC. has developed a patent pending direct oxidation technology that produces high-purity, brilliant yellow nanosized bismuth oxide particles. (The process is also capable of producing bismuth oxide in white and orange.)

The fractional separation found in the granular structure allows users to better control coloration. The nanosized particles are uniform in shape and size, producing more exacting coloration, and analysis reports indicate purities of 99.997%.

The oxide product is now being used in the fire assay and glass industries and is expected to expand to the ceramic, electronic and pharmaceutical industries soon.