Cooking surfaces of glass-ceramic plates with layers with different values for radiation transmission

摘要

A glass-ceramic plate cooking surface comprises a glass-ceramic base layer which allows penetration of thermal radiation having a wave length of from 0.7 to 5 microns and a top covering layer smaller in thickness than the base layer which is tightly joined to the base layer and absorbs the radiation with wave lengths of 0.7 to 5 microns. The glass-ceramic plate cooking surface can have the heating areas indicated by design and can be provided with an additional layer to avoid asymmetric stress and strengthen the cooking surface.