“…Vitreous coatings are made of enamel frits that consist of alkaline aluminaborosilicate to which other inorganic substances may be added to provide desirable physical properties, while silica is the fundamental oxide of glass (Hossain et al, 2014). Sitall coatings are used to ensure specific characteristics, such as heat-resistant and high-temperature corrosion protection (Lazareva, 2020). Ground-coat frits contain more boron oxide than the enamels that are used for the cover coat, while alumina can be added to control viscosity, surface smoothness, and mechanical hardness of the glass (Schäfer, 2010).…”