4-7% will produce a semi-opaque glaze, white (with a blue hint) at 5-9%, 8-10% will give a full opaque. Tin and iron can create variegated surfaces.
Red IRON (III)OXIDE rust powder | ferric oxide | High grade oxide powder
3.5oz 100g Iron Oxide Powder Concrete Pigment for Pastel Tile, Iron Oxide Yellow
BLACK IRON OXIDE POWDER ~ HIGH GRADE PIGMENT ~ 100 GRAMS TO 1.5 KILOS ~ CERAMICS
COBALT OXIDE POWDER - FOR CERAMICS
RED IRON OXIDE POWDER ~ HIGH GRADE PIGMENT ~ 100 GRAMS TO 1.5 KILOS ~ CERAMICS
Red Iron Oxide Powder finest Micronised Grade Brick Colouring 200g-5kg FREE P&P