Volcanic Black Clay - 10 Kgs Pack

Our exclusive in-house black stoneware is a versatile, high-quality clay body designed for both functional and non-functional ceramic work. Ideal for hand building, wheel throwing, and sculpting, this clay offers excellent workability and strength.

When fired in an oxidation atmosphere, it matures to a rich black finish, adding depth and character to your pieces. It pairs beautifully with a wide range of Clay Station glazes, as well as other glazes , making it a flexible choice for any studio setup.

• Develops a maroon color after bisque firing at 998°C.

• Turns black when fired to Cone 6 (1223°C).
  

 Clay Properties:

• This clay is tested under oxidation firing conditions. Not recommended for reduction firing due to a tendency to bloat.
• Maximum working temperature is Cone 7, 1239 Deg C 

These properties can change if fired at different temperature. Few clay properties differ between handmade and wheel-thrown pieces, so here's more data for clarity. 

1. Hand building fired @ Cone 6 (1223 Deg C):

2. Wheel throwing fired @ Cone 6 (1223 Deg C):

Additional Information:

• Dry shrinkage is determined by measuring the reduction in shrinkage after the manufacturing stage to the bone-dried stage.

• Firing shrinkage is determined by measuring the reduction in shrinkage after the bone-dried stage to the final fired stage (Cone 6)

• Absorption is also called as porosity of a clay body 

• Skipping bisque firing can lead to black coring/bloating—direct firing is not advised. Bloating might occur when it is fired beyond cone 7, 1239 Deg C. 
  

• Using a drop-and-hold firing schedule at 1180°C may help eliminate pin holing defects in glazed pieces.

Notes:

• Test the clay body before proceeding with mass production to check for any potential bloating issues.

• Due to the high iron content, we recommend testing your glaze with this clay body to ensure compatibility.

• Drying and overall shrinkage of wheel-thrown pieces may vary depending on the water content used during throwing.

• For batch-specific shrinkage and porosity information for bulk orders, please contact us at 9108852707.

• You can access the list of Claystation Glazes that are compatible with Volcanic Black from this link

Shipping and delivery:

For order quantity more than 100 kgs, if you prefer to opt for customized shipping rates, use warehouse pick up option during check out. Our representative will call to coordinate.