Cobalt Blue PB28 1.High temperature pigment 2.Non-toxic pigments 3.Special anti-far- ... Descriptions:Cobalt Aluminate Blue Spinel ,Pigment Blue 28,high temperature resistant pigment,it is a bright color with reddish blue ... It is mainly used in high temperature (resistant) coatings, ceramics, enamels, glass coloring, coloring of high temperature resistance engineering plastics,food contact plastics ...