Spectrum Glazes is unique among ceramic glaze suppliers in that we focus exclusively on producing the highest quality, most colorful and diverse selection of fired finishes available anywhere. All of our energies are devoted to manufacturing glazes and other ceramic coatings. Our formulations have been developed over our 40 years in business with careful attention to detail, backed by our on-going commitment to thorough testing of materials and every batch of finished product. Most of our products use ceramic frits and stains as their principal ingredients. This provides superior appearance and consistency of results over other products made primarily from raw materials. We also use a high percentage of stains in our formulations to achieve greater intensity, brightness, and depth of color in our glazes, underglazes, etc. We take great pride in being an industry leader in the development of innovative, safe and reliable products.