When the glaze is burning in a high temp process, it bringing about many bubbles, and the bobbles will melt into the glaze and bringing about iron particles to the surface.
When the temp reaches 1200℃ up, the glaze will flow on the surface. The full iron particle parts will flow and mark many thin and long textures on the surface, like hare’s fur.
Fine Porcelain, Wood.
200 ml / 6.76 oz