Mason | 6666
Cobalt Free Black Mason Stain
Mason Stain 6666 Cobalt Free Black reaches black without cobalt, from chromium, iron and manganese. Mason lists it under its brown chemistry, and it needs a zinc free glaze.
$31.95 / 125 g Bag
$31.95
Suggested retail price. In-store prices and availability may vary by location.
A black made without cobalt sits at the edge of a brown chemistry, and the window is narrow, so a small change in the glaze can push the colour back toward brown. Zinc from a glaze melt is the main risk, so Mason's note for this stain is to keep zinc out of the glaze altogether. In a zinc free glaze fired in oxidation to 1260°C (2300°F), about cone 9, or below, it fires a full black.
- A black without cobalt, from chromium, iron and manganese in one crystal
- Needs a zinc free glaze, or it drifts toward brown
- Ceiling 1260°C (2300°F), about cone 9, with an oxidising firing
- A fired and milled pigment, so it disperses into a glaze without grinding
