Quick Answer
A 3-layer coil structure is ideal for strong pots, as it provides sufficient thickness and stability while maintaining a manageable number of layers to allow for even drying and firing.
Coil Structure and Thickness
When building a pot using the coil method, it’s essential to strike a balance between the number of layers and the overall thickness of the pot. A 3-layer coil structure is generally ideal, as it provides a good balance between strength and manageability. Each layer should be roughly 1-2 inches thick, depending on the desired size and shape of the pot. This thickness will allow for even drying and firing, while also providing sufficient support and stability.
Clay Sourcing and Selection
The type of clay used can greatly affect the strength and durability of the pot. Look for a clay body that is high in silica and alumina, as these minerals will help to create a strong and resistant pot. It’s also essential to source clay that is free of contaminants and impurities, which can weaken the pot and make it more prone to cracking. A good quality clay body will typically contain 60-80% silica, 10-20% alumina, and 5-10% other minerals.
Firing and Waterproofing
Once the pot has been built and dried, it’s essential to fire it in a pit or kiln to achieve the desired level of hardness and waterproofing. A firing temperature of around 1800-2000°F (980-1093°C) will help to create a hard, glassy surface that is resistant to water and other liquids. To further enhance the waterproofing properties of the pot, consider applying a layer of natural wax or resin to the surface after firing. This will help to seal any remaining pores and create a smooth, non-porous finish.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.