The Versatile Potential of Bentonite Clay in Pottery

Bentonite clay has traditionally been known for its use in the pottery process. While it is commonly added to clay bodies or glazes for suspended functions, it is not typically used as an individual component for throwing pots. However, enthusiasts often explore unconventional methods, pushing traditional rules and experimenting with unique applications. This article explores the potential use of bentonite clay beyond its typical roles and provides insights into its behavior in pottery clay and glazes.

Understanding Bentonite Clay in Pottery

Bentonite Clay: This form of clay is widely recognized for its high water content and plasticity, which makes it valuable in the pottery industry. It is particularly useful in maintaining the suspension of other materials in glazes, ensuring a smooth and even application. Unlike other types of clay, bentonite can hold significant amounts of water without becoming too loose or too rigid.

Altered Use in Traditional Pottery Crafts

While primary uses of bentonite clay in pottery include enhancing the suspension of components in glazes, it can also play a supportive role in clay bodies. However, when considering its use in throwing, it is essential to note that bentonite’s unique characteristics might not always align with the practicalities of clay body formation and firing.

Experimenting with Non-Traditional Formulations

Adding to Clay Body: If you have some bentonite clay on hand and are looking to experiment, it is worth considering adding it to a clay body. The volcanic ash component of bentonite can contribute to a slightly different firing behavior compared to traditional clay bodies composed of weathered granite. It is advisable to research and understand these differences before incorporation.

Testing Clay Body Behavior

To determine the suitability of bentonite in your clay body, it is recommended to conduct a small-scale test firing. Observe the texture, porosity, and overall behavior of the clay during drying and firing stages. This can provide valuable insights and help you to make informed adjustments to your recipe.

Warning: Clay Body Adaptability

“If its safe rules are made to be broken.” Understanding that conventional rules may not always be appropriate, it is crucial to approach any experimentation with caution. Bentonsilt’s tendency to absorb water differently might affect the drying and firing processes, leading to potential issues such as warping or cracking in the final product.

Enhancing Glaze Suspension

Glaze Suspension: One of the most recognized uses of bentonite in pottery is in glazes. Its fine particle size allows it to effectively suspend other components in the glaze, ensuring a smooth, even, and predictable surface finish. Unlike other suspending clays, bentonite can maintain its form even at high temperatures and concentrations, making it a valuable addition to glaze recipes.

Alternative Uses in Glaze Formulation

While adding bentonite to a clay body requires careful consideration, its addition to glaze formulations is more straightforward. Mix bentonite with your glaze ingredients and observe how it affects the suspension and overall behavior of the glaze. Keep in mind that too much bentonite can lead to a thicker glaze, which might require adjustments to the application technique.

Conclusion

The versatile potential of bentonite clay in pottery is not limited to its primary use in clay bodies and glazes. By experimenting with its inclusion in clay bodies and glazes, you can uncover unique possibilities that challenge traditional norms. Always approach such experiments with an open mind and a thorough understanding of the material’s properties. This exploration can lead to innovative solutions in your pottery craft, enriching your skills and artistic expression.

*Disclaimer: The information provided is for guidance purposes and should be used as a starting point for experimentation. Always follow best practices in pottery and test small scales before applying changes to larger productions.