“This is that same cobalt glaze, but with the white applied more thickly than the cobalt. In most cases like this, you make the pot, you let it dry, and then you fire it once to a temperature that’s less than the final temperature, which helps it absorb the moisture of the glaze. After the glaze is applied, you fire it a second time to a mature temperature. You could fire it all the way through before glazing, but then the clay would respond differently.”