Pottery Clay

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Firing Clay


Blick offers a variety of firing clay for ceramicists at every level of their craft. These high-fire and low-fire pottery clays range from sculpture and earthenware clay to stoneware, porcelain, and raku clay. Used in conjunction with glazes, underglazes, and glaze additives, artists can achieve a range of effects in high-fire, low-fire, and mid-fire environments.


Terra cotta, earthenware, and some stoneware clays work well in low-fire environments, while porcelain and most stoneware clays are designed to be fired in high-fire environments. Ceramic pieces that are fired at lower temperatures are not as strong, whereas high-fire environments encourage a complete fusing of the clay for more functional and durable clay pieces.


Raku clay is a very special type of clay that, after being fired in a low-fire environment, has the ability to withstand the thermal shock of being removed from a hot kiln and then immediately exposed to a cool, natural environment. The glazes used in raku firings — and the process itself — create beautiful, colorful, and often unpredictable results!

Frequently Asked Questions

  • Can I use a low-fire clay with a glaze that fires to cone 5/6?

    This is not a good idea. Firing the clay too hot can destabilize or even melt clay that's meant for lower temperatures. Firing the glaze too low will not provide the heat necessary for it to mature to its expected appearance. The clay and glaze should be matched for firing temperature.