Blackjack Clay - SS-2 Mined Stoneware Clay
Blackjack Clay is a blend of several natural clays mined from the earth in East Texas. The unique process of blending and wet screening results in a clay that has a silky smooth texture with great plasticity.
This stoneware clay has a chocolate brown color when wet, yet fires to a soft buff/tan color. It is excellent for throwing on a potter’s wheel, hand building, slab rolling and sculpting or modeling. This clay is good for beginners as well as professional artists.
This clay fires in a kiln from cone 6 – cone 10. It takes glazes well, and glazes can be applied directly to the greenware for single firing or to bisqueware with a second glaze firing. This clay is good for salt firing and raku firing. Always test fire for glaze compatibility.
Firing range: Cone 6-10 (2269º-2381ºF)
Plasticity (IP Atterberg):
Carbonate content (CaCO3):
Firing shrinkage at Cone 6: 8%
Porosity (water absorption) at Cone 6: 12%
Dry bending strength:
Fired bending strength at Cone 6:
Thermal coefficient (a25-500ºC):