Is air-drying clay suitable for outdoor cooking pots?

Material Considerations

When it comes to making cooking pots, durability and thermal shock resistance are essential. Air-drying clay, also known as earthenware clay, has a high water absorption rate, which makes it prone to cracking and breaking when exposed to heat or moisture. Its average water absorption rate is around 10-20%, compared to 1-5% for low-fire earthenware or 0-1% for high-fire stoneware.

Alternative Materials and Techniques

A more suitable material for outdoor cooking pots is terra cotta clay, which has a lower water absorption rate of around 5-15%. However, even terra cotta clay may not be suitable for high-temperature cooking. For more durable and heat-resistant pots, consider using high-fire stoneware clay or a combination of clay and natural materials like sand or sawdust. To increase the durability of your clay pots, you can also apply multiple layers of a refractory coating, such as a mixture of kaolin and silicon carbide, or a commercial ceramic coating.

Shaping and Firing Techniques

To create functional and durable clay pots, it’s essential to master shaping and firing techniques. Start by creating a symmetrical and balanced shape, then use a combination of hand-building and wheel-throwing techniques to achieve the desired form. For outdoor cooking pots, aim for a thickness of around 1/4 inch (6 mm) to ensure stability and prevent cracking. When firing your pots, use a slow and controlled process to prevent thermal shock and ensure even heating. A recommended firing temperature for outdoor cooking pots is between 1800°F (980°C) and 2200°F (1200°C), depending on the clay body and desired level of hardness.