The pattern was painted using wax resist and the glaze was applied by pouring. This recipe was the product of multiple previous versions and experience in learning how to process the ash to a finer particle size. The ash was just from the burning of paper and cardboard in our office many years ago. This glaze melted to such a good surface that it was suitable for functional ware. These glazes were among my earliest successes in formulating glazes and hundreds of pieces grew from this. M332 is a coarse-particled clay body and most glazes pinhole on it. Yet these ash glazes produced defect-free surfaces (albeit with plenty of variegation from the impurities intrinsic to the material).
Wood Ash Glaze
Common washed wood ash can supply important ceramic oxides when melted, so it can comprise significant percentages in a recipe. Plus it can produce unique visual effects.