SW-219 Opal LustreCone 6 oxidation: Opal Lustre is a glossy, semi opaque glaze that displays variegated shades of blues, greens, and purples. Breaks warm brown over texture. Cone 10 reduction: Color flattens, and warm undertones come through. TIP: This glaze is semi fluid at 3 coats. Additional coats or increased application thickness may result in movement. Can be used in oxidation or reduction firings. Results may vary. The choice of clay body, thickness of