This standard concerns the methods for carrying out the resistance test of porcelain enamels to high electrical voltage, with the aim of identifying defects such as holes, bubbles, breakages, inclusions, poorly covered areas and in general continuity defects of the enamel layer .
UNI 7883-1978 history
1978UNI 7883-1978 Thermal protective layer. High-strength test of glaze uniformity