Cone 6: Wrought Iron creates an intermittent, dappled black gloss-matte finish that is reminiscent of high fire oil-spot glazes. Typically, oil-spot glazes are thickly applied and require some reduction during the firing to achieve the oil-matte effects; Wrought Iron does the job with just two coats in a cone 6 oxidation firing.
Cone 10: Color changes to a dark metallic gray.
TIP: The thinner the application the more brown the glaze. The thicker the application the more black the glaze. This glaze is not completely matte, but will have a matte finish with variation of gloss. Due to the high manganese content, there is a chance of bubbling on a speckled clay body.