Vitreous enamel , also porcelain enamel in US English , is a material made by fusing powdered glass to a substrate by firing , usually between 750 and 850 ° C ( 1,380 and 1,560 ° F ) .
Sometimes called vitreous or porcelain enamel , it is made by fusing powdered glass to a base by firing , usually between 750 and 850 ° C ( 1,380 and 1,560 ° F ) .