AMACO Blue Starlight with Cobalt Celadon<\/strong> is a midfire glaze combination from the Cosmos series, designed for firing at cone 5\u20136. It belongs to a group of reactive surfaces that develop a crystalline-like pattern without extended soak times or complex firing schedules. Unlike traditional high-fire crystalline systems, AMACO Blue Starlight with Cobalt Celadon<\/strong> forms its character within a standard cone 6 firing cycle, relying on glaze interaction rather than kiln manipulation.<\/p>\n\n\n\n The surface reveals a deep blue field layered with lighter formations that read like a night sky. These \u201cstars\u201d emerge through localized crystallization and phase separation within the glaze, enhanced by the presence of cobalt celadon beneath or alongside it. The finish remains glossy, with depth that shifts across the form, especially where the two glazes meet and respond to thickness and heat.<\/p>\n\n\n\n Blue Starlight responds clearly to thickness.<\/p>\n\n\n\n The glaze interacts strongly with form. It tends to activate on shoulders and pooling areas, while remaining calmer on lower, thinner sections. With excessive thickness, slight movement can occur during firing, so controlled application is important, especially on vertical surfaces.<\/p>\n\n\n\n At cone 6 (\u22481220\u00b0C)<\/strong>, the glaze matures reliably and produces its characteristic surface without controlled cooling cycles. Slower cooling can subtly enhance the definition of crystalline features, though results remain stable in a standard kiln schedule.<\/p>\n\n\n\n Blue Starlight is often used in layered applications, particularly with:<\/p>\n\n\n\n When layered over or under other glazes, it can increase surface activity, so testing is recommended. Results also vary with clay body:<\/p>\n\n\n\nApplication and firing behavior<\/h2>\n\n\n\n
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Compatibility and combinations<\/h2>\n\n\n\n
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