Soda-lime glass: Historically, the most common form of glass. It contains three major compounds in varying proportions, but usually silica (about 60-75 percent), soda (12-18 percent), and lime (5-12 percent). Soda-lime glasses are relatively light, and upon heating, they remain plastic and workable over a wide range of temperatures. They lend themselves, therefore, to elaborate manipulative techniques.
Source: Glass: A Pocket Dictionary of Terms Commonly Used to Describe Glass and Glassmaking compiled by David Whitehouse of The Corning Musueum of Glass.