Soda lime glass is the most common form of glass, making up approximately 90% of all manufactured glass. Soda lime glass, or soda-lime-silica glass, is composed of roughly 70% silica (silicon dioxide), 15% soda (sodium oxide), and 9% lime (calcium oxide) with small amounts of various other compounds used as refining agents or to control color. Laser marking glass is done by heating the glass surface with a CO₂ laser. This produces a series of surface microfractures, resulting in a uniform mark that is frosted in appearance. Laser marking of glass allows for significantly more detailed and intricate designs to be produced, compared to other glass marking methods.