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OPUS Colours at Stoneware Temperatures The following OPUS Underglaze colours have been successfully tested at the Stoneware temperature of 1220 Deg C (Cone 6). Additional colours will be added once testing has been completed. If firing at a Stoneware temperature of 1220 Deg C you can use the OPUS Undreglaze colours listed below.
Special Offer: Receive a 10% discount on Underglaze colours when purchasing any 24 x 500ml bottles. Discount is automatically applied at the checkout.
