Mason Stain - 6338 - Cobalt
- This Mason Stain should be applied using the following guidelines from Mason Color:
- Max. firing limit 2300 degrees F (1260 degrees C).
- Best results with no zinc.
- Calcium Oxide content as calcium carbonate should be between 12-15% for best color development. Adding the molecular equivalent of calcium oxide with wollastonite, a natural calcium silicate, often gives better uniformity. The increased silica from the wollastonite must be subtracted or the glaze will have a poor surface.