This usually works very well, especially if you e.g. B. applied too thinly and then want to apply the same glaze again. The drying time on fired glaze is of course longer than on unglazed body. If you want to apply a different color over a fired glaze, the result is unpredictable but often exciting. For good adhesion, you can reheat the fired ceramic to 60 - 100°C before glazing again.