Soda-lime glass is the most common type of glass manufactured in the world. The "soda" in soda-lime glass does not come from a soft drink. Instead, it comes from a substance called soda ash (Na2CO3). Soda ash is made using the Solvay process, which was developed in the 1860s. In this process, soda ash and calcium chloride (CaCl2) are made from sodium chloride (NaCl) and calcium carbonate (CaCO3)