The purity and transparency of Nymphenburg porcelain can only be achieved if the composition of the mass and the firing technique are optimally coordinated. The various firing processes are crucial here: an initial so-called glow firing hardens the porcelain blanks at 950°C. The porcelain blanks are then immersed in a glaze bath and fired at around 1,400°C until they are transparent. They are then immersed in a glaze bath and fired again at around 1,400°C for up to 36 hours. During this second glaze firing, in which the porcelain shrinks by about one-sixth of its size, the glaze fuses with the porcelain. After painting, the porcelain is fired for the last time. During this process, some colors change significantly. It requires the highest skill of a painter until he knows how to estimate how to mix and apply colors and how they develop during firing.