IMPROVED PROCESS FOR PRODUCING LIGHT-STABLE BISMUTH OXYCHLORIDE PIGMENT

摘要

The present invention relates to a process for the production of pearly bismuth oxychloride. /P P According to the invention, a pigment having the reflections of mother-of-pearl and consisting of pearly bismuth oxychloride and a particulate refractory substance is heated to a temperature of at least about 350 degrees C. , for a sufficient time to stabilize said bismuth oxychloride with respect to ultraviolet light. The refractory substance is chosen from micas and talc. /P P The invention makes it possible to obtain, with a minimum sintering, a pearly and shiny pigment, stable to ultraviolet light and of high covering power, intended for example for the cosmetics industry. /p P