RAW MATERIALS R INTRODUCTION AW LIABILITY .
glazes, iron oxide and titanium can produce reddish colors. Our most commonly used iron oxide in both clay and glaze. Same as Brown 521. 81% Fe 2 O 3, this imported, natural iron oxide is bright red in its raw form. A weaker form of iron high clay content. See Cryolite. A refractory material used to reduce shrinkage in clay bodies and give ...