Vitreous enamel, commonly known as porcelain enamel or simply enamel, is a coating made by fusing powdered glass to a substrate through a high-temperature firing process. It provides a durable, scratch-resistant, and non-porous finish that is resistant to chemical and thermal degradation. Other terms that can be used as synonyms for vitreous enamel include China enamel, porcelain coating, glass enamel, ceramic glaze, and fired glass. While vitreous enamel has been widely used to adorn jewelry, cookware, and modern-day signage since ancient times, its impressive mechanical properties and aesthetic appeal have found a new application in modern architectural designs and art installations.