a method for beneficiating a low brightness fine particle size discolored kaolin crude to produce a high brightness coating clay . by combining the two beneficiating techniques of selective flocculation and ozonation , a synergistic phenomena occurs and a clay product of superior brightness and whiteness can be obtained from fine discolored clays that cannot be achieved by beneficiation with either process singularly . by passing the flocced clay through ozonation , the flocculant polymer left in the clay can be completely destroyed .