Spectrum Glazes – Premium Ceramic and Pottery Glazes for Every Firing Range
Discover the full collection of Spectrum Glazes — a trusted name in the world of ceramic and pottery glazes. Here you can order online a wide variety of ready-to-use Spectrum glazes, designed for artists, studios, classrooms, and production potters who want professional-quality color and reliable performance with every firing.
Spectrum Glazes offers everything from Raku glazes to Cone 10 glazes, with several distinct series including low-fire, cone 5/6, and metallic glaze lines. Each glaze is formulated for vibrant, consistent color development and exceptional surface finish. The popular 1100 Series Cone 5/6 glazes are especially loved for their layering potential — they combine beautifully with Amaco Potter’s Choice and other glaze brands to create stunning, custom results.
Every glaze in the Spectrum collection is studio-tested, dependable, and easy to use. Whether you’re glazing functional ware, decorative ceramics, or classroom projects, you can order with confidence knowing that all Spectrum glazes ship free at Sheffield Pottery and are backed by decades of ceramic innovation.
What makes Spectrum Glazes stand out among ceramic glaze manufacturers is their exclusive focus on glaze excellence. Founded in 1979 by Robert Arnfield, who brought over 25 years of glass industry expertise, Spectrum has dedicated itself entirely to creating the highest quality, most colorful, and diverse fired finishes available. Over more than 20 years of development and refinement, Spectrum has perfected formulations using ceramic frits and stains as principal ingredients — delivering superior color intensity, brightness, and consistency compared to glazes made from raw oxides and minerals alone.
Spectrum’s advanced formulations use a higher percentage of color stains to produce brilliant, saturated, and dependable hues that fire true every time. Each batch is carefully tested for consistency, reliability, and finish quality — ensuring professional results in every firing range from low-fire earthenware to high-fire stoneware and porcelain.
At Sheffield Pottery, we take pride in offering the complete line of Spectrum Ceramic Glazes for potters and ceramic artists who demand both performance and beauty. Bring your work to life with Spectrum — where color, chemistry, and craftsmanship meet.
OUR PROCESS
Natural Sheffield Clay is mined on our property from as seen at one of the open clay pits. The Sheffield Clay deposit is located in Sheffield, Massachusetts, on U.S. Route 7 in the Southwest corner of Berkshire County.