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Range of Spectrum Hi fire, cone 4 6 (1160ºC-1241ºC) Stoneware Glazes.There are 3 distinct types of glaze: clear glazes; plain coloured glazes; and reactive glazes. In general clear glazes are used to cover designs created with underglazes, there is a choice of gloss, satin or crackle finishes. The plain coloured glazes are opaque and come in gloss and satin finishes. Some of the most popular stoneware glazes are the reactive colours which produce multi-tone and multi-coloured effects by the combination of various metal oxides. Interesting effects can be created by layering these reactive glazes.
Clear Glazes – 1100 Clear Gloss works best when applied thinnly and will work over most commercially available underglazes.1120 Clear Satin is not as translucent as as clear gloss and will tend to mute the appearance of the decoration underneath. It should be kept thin (1 or 2 coats only) to improve clarity.1187 Clear Crackle develops after the piece has been removed from the kiln and allowed to cool, rubbing dyes or pigments into the surface can emphasize the crackle pattern.
Coloured glazes – Use 2-3 coats
Reactive glazes – These are formulated to produce reactions during the firing cycle and give very interesting and varied
effects. The final appearance of the glaze is dependent on firing temperature, glaze thickness and the composition of the clay body being used. The same glaze can look quite different on different clay bodies, the sample tiles shown are 3 brush coats of glaze fired to cone 5 in an electric kiln on a white clay body, different results should be expected in reduction. Some of the reactive glazes are more fluid than others and may run.(Colours shown are an indication only)