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5” premium firebrick plus 1″ of block insulation
• antiquing
The tile displayed is the final fired result at cone 10
off-white glaze that contains a variety of brown crystals that melt during the firing
Their performance at cone 6 is noted on each individual product label
Spectrum Cobalt Blue 537 Underglaze Spectrum Stoneware 1100 Series 5” premium firebrick plus 1″Spectrum's 500 Series Underglazes are all lead free, dinnerware safe, and A P non toxic when covered with a clear glaze. Underglazes can be used at almost any temperature range and can be applied to bisque or raw clay. Two to three coats are required for opaque, vibrant colours. The samples shown are at Cone 05, but these underglazes can be fired from low temperature (Cone 06 04) to high temperature (Cone 9 10). Some variation in colour will occur at
