PREPARATION PROCESS OF PHOTOCHROMIC PIGMENT AND MAKE-UP COMPOSED OF IT

摘要

This relates to preparing photochromic pigment and cosmetics which contains it. The pigment manufacturing process comprises : 1)dispersing titanium dioxide in ferrate aqueous solution; 2)coprecipitating ferrous hydroxide on the surface of titanium dioxide by additional titration with alkali; 3)drying it without filtering and washing and 4)calcinating it at 350-450 deg.C and firing it at 750-900 deg.C. The above ferrate is such as ferric chloride, ferrous chloride, ferric sulfate and ferrous sulfate.