To color your clay add up to 5% stain to a light colored body. Stain will be more impactful in lighter more vitreous clay bodies. To color an underglaze add up to 20% stain to an underglaze base, adding Ultrox can intensify the color. To color a glaze add up to 10% stain to a glaze base, adding Ultrox can intensify the color. You can mix multiple stains together to get different colors. Some mason stains have incompatibility issues with certain glaze and clay components, check Mason Color Works website for details.
 
Chrome Iron Manganese Brown Spinel, an inorganic pigment, is a reaction product of high temperature calcination in which Chromium (III) Oxide, Iron (II & III) Oxide, and Manganese (II & III) Oxide in varying amounts are homogeneously and ionically interdiffused to form a crystalline matrix of spinel Its composition may include the modifier ZnO.