When a ceramic artist cleans his glaze brushes, making irregular strokes across the surface of pieces that have only undergone the first, bisque firing, he or she is essentially creating a palette on which different glazes mix in unpredictable ways. This can result in unique color combinations, textures and effects that will add character and interest to the final product after the second glaze firing.
This unpredictability adds an element of surprise and creativity to the finished pottery, making each piece truly unique.
The beauty of this technique lies in its spontaneity and organic results. Artists cannot fully control how a glaze will interact with other glazes and the bisque product itself, which can lead to unexpected and exciting results. This is a wonderful example of using random aspects of the artistic process to create something truly unique and exciting.