December 24, 1974

A small amount of a bismuth compound is incorporated with kaolin clay during the processing of the clay. The clay product is employed in an aqueous coating composition adapted for coating book or magazine paper in order to increase the opacity of the resulting clay film.

5

December 24, 1974

05/451,954

March 18, 1974

427/372.2   427/397.7 501/141

D21H   19/00   (20060101)   D21H   19/40   (20060101)   C09C   1/40   (20060101)   C09C   1/42   (20060101)  

This is a division, of application Ser. No. 270,498, filed Jul. 10, 1972, now U.S. Pat. No. 3,316,153.

106/72   106/288B   106/38B   117/152   117/155UA   117/156