Boss Base is a ceramic glaze from Speedball as part of the Speedball line. It is designed for ceramic artists and potters who want to add color, surface character, or a finished glaze surface to fired work.
Firing range: Cone 5–6. Apply and fire according to the product's recommended application thickness and firing schedule. Glaze appearance and movement can vary with clay body, coat thickness, kiln atmosphere, firing schedule, and cooling. Test before production use.
Product: Boss Base
Manufacturer: Speedball
Manufacturer Part Number:
Series/Category: Speedball
Firing Range: Cone 5–6
Product Type: Ceramic Glaze
Additional information: Results with Boss Base can vary with clay body, surface preparation, application method, coat thickness, firing schedule, kiln atmosphere, and cooling rate. Layering or overlapping glazes can also change the final surface. Follow the current Speedball product guidance for application and testing.
For functional ware, evaluate the finished fired surface for the intended use and follow the manufacturer's current food-safety and surface-use guidance where applicable.
Other resources: See the current Speedball product literature, color charts, application instructions, firing information, layering recommendations, and Safety Data Sheet (SDS) when available. GlazeQueen also carries a broad selection of ceramic glazes, clay, underglazes, tools, kiln supplies, and studio equipment.