SW-111 Wrought IronCone 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