... size < 1 micron. Small water absorption, good penetrability for ultraviolet ray, more stable in the atmosphere and under ... soluble in hot strong acid. Good alkali resistanceApplication:1)Used for coloring of construction, paints, plastic rubber, printing ink, ... material including oil paint, antisepsis, spray, mosaic bricks, for concrete production, bricks used in pavement, colorful tiles, ect.3 ...