|Monthly Tech-Tip |
An example of splitting, where a thrown clay develops a split minutes after throwing. This often happens at stretch-points with sandy or groggy clay bodies or those that have a wide range of particle sizes (e.g. native clays not ground to 200 mesh). The larger particles create networks into which water can penetrate and begin and propagate a split. It is thus wise not to leave water or high-water-content slip on any surfaces experiencing tensile stress during forming.
Splitting at the Plastic Stage
Pottery clays can split at the plastic stage, sometimes ware can fall down right in front of your eyes. Why?