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 30 years in business with careful attention to detail, backed by our on-going commitment to thorough testing of materials as well as 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, such as minerals and metal oxides. We also use a higher percentage of stains in our formulations which gives greater intensity, brightness, and depth of color to our glazes, underglazes, etc. We take great pride in our products and hope that you will get as much satisfaction from using them as we do from making them. We also take pride in being an industry leader.