manufacturer which began in Shenzen, China which produces glass ceramic materials and other special hardened-glass applications like vaporizer modification tanks. The same class of material is also used in Visions and CorningWare glass-ceramic cookware, allowing it to be taken from the freezer directly to the stovetop or oven with no risk of thermal shock while maintaining the transparent look of glassware. Sources Literature McMillan P.W., "The glass phase in glass-ceramics", Glass Technology, 1974, Vol. 15 (1), P. 5-15 Bach H. (Editor), "Low thermal expansion glass ceramics", Springer-Verlag (1995). Holand, Wolfram and Beall, George H. Glass-Ceramic Technology. Wiley, 2002. American inventions 01 Ceramic materials Glass engineering and science Glass chemistry