Cup with Wadding Welch Ovenware stoneware Yakishime
This cup teaches a valuable lesson about wadding for a wood firing in which significant ash glaze is expected. In particular, when placing wadding at the base of a piece, the foot should not touch the wadding in any manner. The wadding could be inside the foot ring, or outside it (increased chance of scars) -- but if the foot ring is on the wadding, it won't ever come off after the firing is complete.
This bowl was fired upside down. The lesson it teaches is that one must make certain the pieces is sufficiently elevated above the shelf. Notice the broken glass on the rim? That's where glaze dripped and touched the shelf.