Underglazes (Opaque) Mayco's Underglazes have been reformulated to enhance performance characteristics for broader firing range, applicability to surface and versatility in design. Use them with translucent gloss glazes, crystals and stoneware glazes for beautiful glaze combinations. * Wide firing range: Colours maintain their vibrancy from cone 06 to cone 10 * Apply to bisque or clay * One coat for brush work & design, 3 for opacity * Intermixable * One step firing: Mayco's UG's and clear glazes can be co-fired producing brilliant colour and a gloss finish in just one glaze firing * Non toxic, food safe when clear glazed