Abstract: The method which is the subject of protection is characteristic by the fact that firstly is made the suspension consisting of 10 to 20 mass % of mineral talc and 80 to 90 mass % of water; resulting suspension is homogenized and thereafter is heated to the temperature 50° to 70° C. To heated suspension is then added 37% hydrochloric acid in the amount of 1 to 6 mass % under continuous stirring. After reaching pH 3 to 5 and increasing the temperature up to 85° C., to the suspension is then added concentrated sulphuric acid in the amount of 1 to 5 mass %. The suspension is further maintained at the temperature up to 90° C., then it is chilled to the ambient temperature and thereafter is separated the sediment which is finally dried at the temperature 140° to 160° C. after washing with water and reaching pH 5 to 6.

Abstract: The method which is the subject of protection is characteristic by the fact that firstly is made the suspension consisting of 10 to 20 mass % of mineral talc and 80 to 90 mass % of water; resulting suspension is homogenized and thereafter is heated to the temperature 50° to 70° C. To heated suspension is then added 37% hydrochloric acid in the amount of 1 to 6 mass % under continuous stirring. After reaching pH 3 to 5 and increasing the temperature up to 85° C., to the suspension is then added concentrated sulphuric acid in the amount of 1 to 5 mass %. The suspension is further maintained at the temperature up to 90° C., then it is chilled to the ambient temperature and thereafter is separated the sediment which is finally dried at the temperature 140° to 160° C. after washing with water and reaching pH 5 to 6.