BORY1
DraftDescription
BORY1 is a crystalline glaze base formulated for a firing range of Cone 6–10. The incorporation of Gerstley Borate facilitates lower temperature maturation, while titanium dioxide acts as a nucleating
Original Author
Tony Hansen
Usage Instructions
BORY1 is a crystalline glaze base formulated for a firing range of Cone 6–10. The incorporation of Gerstley Borate facilitates lower temperature maturation, while titanium dioxide acts as a nucleating agent to seed crystal growth. When fired at Cone 6, crystal formation may require manual seeding; a peak temperature of 1221°C with a 20-minute hold, followed by a controlled cooling schedule with holds between 1010°C and 1140°C, is recommended. Higher firing temperatures (e.g., Cone 9) yield greater variation in crystal morphology. Visually, this glaze is characterized by prolific crystal development against a visible base ground. For colorants, copper produces a turquoise aesthetic. Limit cobalt carbonate to 2.5% or cobalt oxide to 2.0%; add 0.5% vanadium or rare earth oxides to mitigate surface 'felting.' Nickel is generally incompatible with this base due to high titania content. BORY1 exhibits a stable shelf life exceeding six months when mixed. Note: The fired surface has low abrasion resistance and is susceptible to scratching, making it unsuitable for high-utility functional ware.