Although glaze crawling - when glaze recedes away from an area in the firing, leaving bare clay - is often considered to be a glaze defect that should be avoided, many ceramic artists use this so-called defect quite effectively as an intentional decorative element. Glazes are sometimes formulated to intentionally crawl and create reticulated surfaces resembling lichens, leopard coats, or lizard skin.
Today, Robin Hopper presents a slip recipe and a base glaze recipe for such an effect, and gives examples of this slip and glaze combination with various ceramic colorants added. - Jennifer Harnetty, Editor.
Glaze Crawling, On Purpose
Putting the reticulation glazes over a colored slip allows the top glaze to move and the visible cracks to be colored between "islands" of glaze. Any colored slip will do, but one of the most interesting is usually black.
Download your free copy of 15 Low-Fire Glaze Recipes from the Pros: Recipe Cards for Low Fire Pottery Glazes for more great reticulated glaze recipes!