These are made from Plainsman M370 casting and fired to cone 6 using the PLC6DS firing schedule. There is a caution with thin cast ware: If walls are not thick enough to provide the porosity to be able to absorb all the water from the glaze, then the slow-drying glaze could crack and produce crawling during firing. Thinner pieces (not shown) did crawl in this firing.
G2934Y - Cone 6 Magnesia Matte Low LOI Version
The same chemistry as the widely used G2934 but the MgO is sourced from a frit and talc instead of dolomite. It has a finer surface, less cutlery marking and staining.