BLACK STONEWARE CLAY 28 LB. BOXES $37.95 Qty Out of Stock This item will be shipped within 10 days. Enter your e-mail address to be notified when product is in stock Notify Me! Add Review Ask Question Product Description Reviews (0) Questions Black Stoneware Clay with Impalpable Grog Black stoneware clay body with 40% impalpable grog (up to 80 Mesh). Formulated for artistic ceramics, it is ideal for wheel-throwing and modeling smooth pieces with fine details. The high content of grog confers an excellent behavior during drying and firing. Its beautiful and intense black firing color in oxidizing atmosphere is very exclusive of PRN range and becomes an ideal artistic mean of expression. In reducing atmosphere, metallic effects with shades of blue are obtained. Suitable for tableware (food-safe), according to ISO 6486.  Firing range: Cone 5-6 (2205o-2269oF) Biscuit: Cone 06 (1855oF) Water content: 21% Plasticity (IP Atterberg): 22 Carbonate content (CaCO3): 0% Drying shrinkage: 7.0% Firing shrinkage at Cone 6: 7.1% Porosity (water absorption) at Cone 6: 1.3% Dry bending strength: 4.6 N/mm2 Fired bending strength at Cone 6: 33.3 N/mm2 Thermal coefficient (a25-500oC): 51.1x10-7oC-1 ___________________________________________________________________________ Arcilla de gres negra con Grog impalpable Cuerpo de barro gres negro con un 40% de grog impalpable (hasta 80 Mesh). Formulado para cerámica artística, es ideal para lanzar ruedas y modelar piezas lisas con finos detalles. El alto contenido de grog le confiere un excelente comportamiento durante el secado y la cocción. Su bello e intenso color negro de cocción en atmósfera oxidante es muy exclusivo de Gama PRN y se convierte en un medio artístico de expresión ideal. En atmósfera reductora, Se obtienen efectos metalizados con matices de azul. Apto para vajilla (apto para alimentos), según ISO 6486. Rango de disparo: Cono 5-6 (2205o-2269oF) Galleta: Cono 06 (1855oF) Contenido de agua: 21% Plasticidad (IP Atterberg): 22 Contenido de carbonato (CaCO3): 0% Contracción por secado: 7.0% Contracción de cocción en el cono 6: 7,1% Porosidad (absorción de agua) en el cono 6: 1,3% Resistencia a la flexión en seco: 4,6 N / mm2 Resistencia a la flexión al fuego en el Cono 6: 33,3 N / mm2 Coeficiente térmico (a25-500oC): 51,1x10-7oC-1 Currently there are no reviews for this product. Currently there are no questions for this product.