Crown glass is a type of glass known for its clarity and low distortion. It is made by melting silica, soda, and lime, which are then shaped into sheets. This glass is often used in windows and optical applications due to its excellent light transmission properties. Historically, crown glass was popular in the production of window panes during the 17th and 18th centuries. The manufacturing process involves spinning molten glass to create a thin, flat sheet. Today, crown glass is less common but still valued for its aesthetic qualities in certain artistic glassworks.