store_logo
Vulcan Black Clay Medium

Vulcan Black Clay Medium

Sold out

£21.76

Share

lack Vulcan™ Black Stoneware (Medium) 164-VUM | Recommended firing 1200-1260C / Cone 5-7*

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 are obtained. Containing a medium grog (up to 35 mesh) It behaves excellently during drying/firing and its high plasticity makes it ideal for modelling. Supplied in a 12.5kg bag.

  1. Firing range: 1200-1260C / Cone 5-7
  2. Biscuit: Cone 06 (1855ºF)
  3. Texture 4-5 on our indicative texture scale, smooth1 coarse 10.
  4. Water content: 21%
  5. Plasticity (IP Atterberg): 22
  6. Carbonate content (CaCO3): 0%
  7. Drying shrinkage: 7.0%
  8. Firing shrinkage at Cone 7: 4.5%
  9. Porosity (water absorption) at Cone 7: 9.4%
  10. Dry bending strength: 2.0 N/mm2
  11. Fired bending strength at Cone 7: 27.5 N/mm2
  12. Thermal coefficient (a25-500ºC): 55.8x10-7ºC-1