1100 Series - Spectrum Glaze Co. offers an outstanding line of Mid-Range (C/4-6) Glazes. The Spectrum 1100 Series glazes are LEAD FREE. All are A.P. NON-TOXIC, (except Category D) & DINNERWARE SAFE (except for #1187 & #1188). These glazes offer a wide variety of colors, not usually found at Mid-Range temperatures. Schools and Studios alike have responded enthusiastically to the convenience, variety and reliability of these glazes. SpectrumÂs 1100 Series is available in both dry and liquid form. 1100 Series dry glazes are supplied 5# & 10# bags formulated for dipping.