Oribe Chawan Stoneware Cone 10 Gas Reduction 4 x 4 x 3.25 This kurinuki chawan (Tea Bowl) was carved by hand out of a solid shaped block of mogusa style stoneware. It was then painted with gosu slip, coated in a traditional feldspathic copper glaze, & fired to Cone 10 (about 2350F, 1287C). The clay is completely vitrified at this temperature & can safely be microwaved & washed in the dishwasher. Shino Oribe Matcha Chawan, Hand Painted Tea Bowl