Glass-wool industry
Natural glas was firstly used by humans in the stone age, the proces of glassmaking started around 6000 years ago.
Today glass is mostly known by use in windovs and bottles. Small part of glass is used for insulation products where very long and thin threads are made through the wear resistant castings.
In similar way the wool for insulation is made, production have with big difference in the use of higher wear resistant materials, usually based on cobalt basis.
