PROCESS FOR PREPARING COLOR PIGMENTS CONTAINING TITANIUM DIOXIDE

摘要

The invention concerns a method for preparing coloured pigments with titanium dioxide base comprising the calcination of octahedrite dioxide until complete transformation of the octahedrite titanium dioxide into rutile titanium dioxide, in which is used an octahedrite titanium dioxide having a rutile phase temperature of at least 1000 DEG C and a proportion of sulphate, expressed in SO3, of at most 1 wt. %.