Vulcan Black Stoneware Clay Fine NEW RECIPE 164-VUF
Description
Firing Range: 1200°C-1240°C
IMPROVED RECIPE: From batch number 2322 (week 23, 2022) recipe improvements have been made to improve the fired colour (darkness) and plasticity.
Vulcan Black Stoneware is unlike any other on the market, providing an unusual intense brown-black colour when fired in an oxidising atmosphere. In a reducing atmosphere a metallic finish with shades of blue is obtained (Note: Too-heavy reduction will cause bloating).
Containing 40% fine grog (up to 80 mesh), Vulcan Black Stoneware Fine has been formulated for artistic ceramics. It behaves excellently during drying/firing and its high plasticity makes it ideal for modelling. It is widely used for murals and sculpture and is ideal for detailed work.
Vulcan Black Stoneware (Fine) 164-VUF is suitable for tableware (food-safe), according to ISO 6486 when fired as recommended (less than 3% porosity).Notes regarding Vulcan black stoneware bodies
Vulcan is not toxic according to European Rules (CLP) and also American Rules (ASTM D 4036). The manganese dioxide content in Vulcan bodies is lower than 5%: Under the CLP regulation, the manganese dioxide content required for classification as toxic must be greater than 25%.
Elements that can react with this clay are Zinc, (Zn), zirconium (Zr) and tin (Sn).
Caution
Vulcan Black Stoneware is sensitive to cooling. It is recommended not to open the kiln until it has reached room temperature to avoid cooling breaks, especially in flat and thin pieces. Keep vent plugs in place during cooling. Do not open/crack open the kiln lid to rush the natural cooling process.
For more information on this clay, please follow this link: Technical Data
- Texture: 2-3
- Fired Colour: Black
- % Total Shrinkage at 1100°C: N/A
- % Total Shrinkage at 1200°C: N/A
Providing an unusual intense brown-black colour when fired in an oxidising atmosphere. In a reducing atmosphere a metallic finish with shades of blue is obtained.
Extra Info
- 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
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Vulcan Black Stoneware Clay Fine NEW RECIPE 164-VUF
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