Chris
de
United Kingdom
asks
I’ve bought three terra color glazes . Firing temperature1020-1080. Which clays can be used with these glaz es.?
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Réponses de Scarva:
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Really any white clay can be used, however to reduce crazing post firing I would recommend sticking to a white earthenware such as ES130 or ES130 Grogged for these glazes.
Hope this helps!
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Ellie
de
United Kingdom
asks
Are your earthenware glazes and underglazes food safe?
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Réponses de Scarva:
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If a glaze is food safe or not depends on several factors including the type of clay used, the firing temperature, the shape of the vessel, the thickness of glaze even the position of the vessel in the kiln can have an effect on the glaze. Ideally a food safe test would be carried out by a reputable body like British Ceram. In the case of earthenware glazes and underglazes it would not be ideal as the clay will still be porous at such a low temperature and glazes will most likely craze and crackle, this means bacteria can get into the cracks.
The glazes most suitable for food safe ware are glossy stoneware glazes fired on smooth stoneware clay in an electric kiln.
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Terracolor Brush-On Earthenware Glazes are available ready to use straight from the jar, simply stir well then apply three coats to your bisque pieces. Glaze will dry quickly allowing you to move them to the kiln for firing. For best results fire 1040°C with a 30 minute soak on a computerised controller.
