1100 Series Stoneware Glazes . All of these glazes are lead-free and dinnerware safe. Most of them also come with the A/P non-toxic rating from the Art & Creative Materials Institute (ACMI) which is clearly marked on the product label. Some of the reactive type glazes are rated C/L by the ACMI which means that they are considered toxic in the liquid (unfired) state due to the presence of heavy metals, such as copper or vanadium, beyond the non-toxic legal limit. C/L rated glazes are not suitable for use by young children or pregnant women. We have 3 types of Stoneware Glazes: clear glazes; plain colored glazes; and reactive glazes. These are described in more detail below. In general, clear glazes are used to cover designs created with underglazes. There is a choice of gloss, satin or crackle finishes. Our plain colored glazes are opaque and come in gloss and satin finishes. Some of our most popular stoneware glazes are the reactive colors which produce multi-tone and multi-colored effects by the combination of various metal oxides. Many other interesting effects can be created by layering these reactive glazes. In particular, layering a more fluid glaze, such as 1173, underneath or on top of one of the other reactive glazes often produces beautiful results. All of our Stoneware Glazes are available wet in pints and gallons. The wet glazes are set up for brushing application. CLEAR GLAZES 1100 - Clear Gloss Glaze (cone 4/6) An excellent lead free, A/P non-toxic, dinnerware safe stoneware clear gloss glaze which is compatible with most commercially available underglazes. Like most clear glazes 1100 - works best when applied thinly. 1120 - Clear Satin Glaze (cone 4/6) Also lead free, A/P non-toxic, dinnerware safe and suitable for use over underglaze decoration. Satin clear glazes are not as translucent as clear gloss glazes and will tend to mute the appearance of underglaze decoration somewhat. It should be kept thin (i.e. 1 or 2 coats by brushing) to improve clarity. 1187 - Clear Crackle Glaze (cone 4/6) A lead free, A/P non-toxic clear crackle glaze. After the piece has been removed from the kiln and allowed to cool the crackle pattern will form. A colored dye can be rubbed into the surface to emphasize the crackle pattern. Crackle glazes are not considered dinnerware safe due to the possibility of bacteria growth in the cracks.