ON THE THERMAL AND CHEMICAL CHANGES OF ROSEKI ORE AND THEIR APPLICATION

Abstract

The author has tried to determine the composition, thermal change, specific gravity of the roseki clay produced from roseki ore (aggregation of pyrophyllite, kaolinite and diaspore) and the diameter of its grain.
As the results of this experiment it becomes clear that the roseki clay can substitute the titanium oxide used as forsted agent of artificial silk.