... 4. Product Packing:25 kg/ craft paper bag,22MT/20FCL (Iron Oxide Red);25 kg/ craft paper bag,13 MT/ 20 ... , soluble in hot strong acid. Good alkali resistanceApplication:1)Used for coloring of construction, paints, plastic rubber, printing ink, porcelan, ... the painting material including oil paint, antisepsis, spray, mosaic bricks, for concrete production, bricks used in pavement, colorful tiles, ect.3 ...