After the first firing, also known as biscuit or annealing firing, the items can be glazed.
The bisque firing gives the porcelain a certain strength at a temperature of 950 °C, whereby the surface becomes as absorbent as a sponge.
After this firing, the items can be dipped in the glaze, after which they are subjected to a second firing, known as glaze firing, at 1380 °C.
In this step, the glaze fuses with the porcelain and forms a smooth, shiny surface.