lithopone

Lithopone is a white pigment composed of a mixture of barium sulfate (28 - 30%) and zinc sulfide (68 - 70%) with trace amounts of zinc oxide.It is produced by precipitation through filtering, heating and quenching works. Lithopone has mostly been replaced by titanium dioxide which is more durable, but it is much cheaper. It is used as a base for lake pigment and used as a inert pigment for paint, ink and cosmetics as well as in a large range of applications in plastic industry. It is used as a filler in paper, leather, and linoleum. 
Item                                                    Standard  
                                          B301                         B311  
Ba+SO4 (as ZnS)%(m/m)MIN                      99                           99  
Zinc (as ZnS) (m/m)%MIN                       28                           30  
Zinc Oxide %(m/m) MAX                         0.6                          0.3  
105   Volatile%(m/m)MAX                       0.3                          0.3  
Water Soluble%(m/m) MAX                       0.4                          0.3  
Screen residues (63um mesh) %(m/m) MAX       0.1                           0.1  
Oil absorption g/100g MAX                     14                           10  
Color Killing
(Compare with standard specimen)% MIN      105                          105