Spectrum Cobalt Blue Underglaze

Spectrum Underglazes offer a full palette of rich, vibrant colours, which fire from 1000-1280°C. Spectrum underglazes are;

• Opaque with 3 coats,

• Semi-opaque with 2 coats,

• Semi-transparent with 1 coat.

They are compatible for use under most of our clear glazes. Unlike many other brands of underglaze Spectrum use a frit base. The advantages to the user are that they can be applied on greenware or bisque and they can be used with or without a clear glaze covering. When used without a clear glaze cover they have a matte velvet like surface. However, when used without a clear glaze cover they are not considered dinnerware safe because the rough surface can be difficult to clean and can encourage bacteria growth. Specrum underglazes can be intermixed to create your own colours.

• Rich, vibrant colours

• Lead Free      

• Wide firing range 1000-1280°C

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