SIO-2 PRNI Black Stoneware High Fire Pottery Clay, 4.0 lb (1.8 kg) | Kiln-Fired Clay for Wheel-Throwing, Handbuilding & Modelling - Ready-to-Use

Introducing our exclusive Black Stoneware Clay, meticulously formulated for artistic ceramics. This clay is a perfect choice for wheel-throwing and modeling, allowing you to create smooth pieces with intricate details. Crafted with precision, our clay offers exceptional properties, ensuring excellent behavior during both the drying and firing processes. The high content of impalpable grog in our Black Stoneware Clay provides exceptional stability and support during shaping, drying, and firing. The grog infusion contributes to the clay's resilience, minimizing the risk of cracking or warping, and allowing you to work confidently on your projects. Technical Specifications: Firing Range: Achieve optimal results within the temperature range of 1200-1240ºC or Cone 5-6, ensuring versatility and reliability in firing performance. Biscuit Temperature: Our clay reaches a temperature of 1000ºC or Cone 06 during the biscuit firing process, providing an ideal foundation for subsequent glazing and coloring. Water Content: With a water content of 21%, our clay offers excellent workability and ease of use during shaping. Plasticity (IP Atterberg): Boasting a plasticity rating of 22, our clay offers exceptional malleability and responsiveness, allowing for intricate details and precise shaping. Carbonate Content (CaCO3): Our clay is formulated with a carbonate content of 0%, ensuring a consistent and controlled firing process. Drying Shrinkage: Experience minimal shrinkage during the drying process, as our clay maintains a drying shrinkage rate of only 7.0%. Firing Shrinkage (1240ºC): Our clay exhibits a firing shrinkage of 7.1% at 1240ºC, ensuring precise and consistent results in the final fired pieces. Porosity (Water Absorption at 1240ºC): Achieve a balanced level of porosity, as our clay showcases a water absorption rate of 1.3% at 1240ºC.