Natural mica flakes, obtained as a result of grinding plates and fragments of natural mica blocks, are sorted by colour and then sieved by the sieve fractions separated by the size of the flake. Mica is used in a variety of products ranging...
Hard of unifrom colour, free from all vegetable and mineral staisns , cracks buckles and other similar defeects and foreign inclusion , except that may be slightly wavy and may contain slight air inclusion in not more than on e - half of the usable...