Plate of transparent, colourless lithium aluminium slicate glass ceramic with opaque, coloured underside coating

摘要

A kitchen electric cooking hob has a glass ceramic top panel with heating elements. The glass ceramic panel has a colorless lithium aluminum silicate panel in which the primary crystal phase is high-quartz mixed crystals. One side of the panel bears a coating non-translucent, colored, temperature-stable containing Nd2O3 in the range 40 to 4000 ppm, and a yellowness index on a 4 mm thick glass-ceramic panel of less than 10%. The color is as defined in the CIELAB color system.