I made the following glaze:
Scoria dust (40 mesh) 37.5
Hardwood ash (unwashed) 37.5
Ball clay 7.3
Applied to Laguna Electric brown clay. Fired to cone 5 oxidation. Probably underfired, but I like the "natural rustic" appearance. I applied it to a Native American flute. I thought its rough texture matched the piece. I will be doing line testing at cones 6 and 7 to see if I can get a better melt.
Does anyone think this has potential?