Ceramic Basin Construction
Pottery is made by a blend of clays, fillers and fluxes being fused together during the firing process. There are high fire clays and glazes which are heated to over 1200 °C (2200 °F) and are extremely resistant to fading, staining, burning, scratching and acid attack. Low fire clays, fired below 1200 °C, most often used by large commercial manufacturers and third world producers, while durable, are susceptible to scratching and wear over time. The clay body is first bisqued to about 1000 °C (1900 °F). In the second firing a white or coloured glaze is applied and is melted by heat which chemically and physically fuses the glass (glaze) to the clay body during the same firing process. Due to the firing process and natural clays used, it is normal for the product to vary in size and shape, and +/- 5mm is normal.
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