United Carboruudm & Electrite Company file
The Carborundum capsule
Name/Title
United Carboruudm & Electrite Company fileEntry/Object ID
2025.1.710Description
Circular metal tube with a screw top containing a round stick-like file, made of artificial corundum. Description : Corundum is a crystalline form of aluminum oxide (Al2O3) with traces of iron, titanium and chromium. It is a rock-forming mineral. It is one of the naturally transparent materials, but can have different colors when impurities are present. Transparent specimens are used as gems such as sapphires and rubies. Rubies are red due to traces of chromium in the corundum. All other colors of transparent corundum are called sapphires. Deep blue sapphires are blue due to the presence of titanium and iron.Context
The text on the tube says: United Carborundum & Electrite Works Co., 26 Stamford Street, London S. E. 1. Carborundum Electrite is the oldest European manufacturer of SiC and artificial corundum grinding tools. An American inventor Ascheson registered his patent of invention on CARBORUNDUM production (silicon carbide) in 1891. A licensee was bought for Europe by Kauffman and the first artificial corundum – ELECTRITE - was manufacture in 1897. The company moved from Vienna to Benátky, (1922) then started production in Dresden and Düsseldorf, Germany (1926). In !936 Carborundum was registered as a trade mark.Category
Bicycles, motor bikes, mechanical, Tools