Stack and slam kneading involves cutting the clay into sections with a string or cutting wire, stacking the sections on top of each other, and then pounding or pressing them together repeatedly. This process is repeated several times until the clay has a uniform consistency and no entrapped air.
Stack and slam is especially useful when working with large quantities of clay, as it is less physically demanding than other techniques such as spiral kneading.
In industrial production ceramics studios or in workshops that create large pieces, Stack and slam kneading is a standard technique; it is also useful when recycling clay that has been reused from previous work.
Interesting Fact
Unlike traditional hand kneading, this method does not require as much control of pressure or movements. It is a process that relies more on the repetition of cuts and strokes than on the refined technique of the potter, making it an efficient method for those who need to prepare large volumes of clay quickly.
Helpful Tip
Make sure the wire you use to cut the clay is sharp and clean. If the string is dirty or damaged, it can tear the clay instead of making a clean cut, which will affect the final quality of the dough.
