The name of float glass refers to its manufacturing process: the molten glass is floated onto a bed of molten tin and onto a cooling kiln. The manufacturing process enables excellent optical quality in the result. The most common float glass thicknesses are 4, 6, 8, and 10 mm.
Tempered glass is physically and thermally strong, and it has excellent flexural strength. It is around 4–5 times stronger and more heat-resistant than non-treated glass. When tempered glass breaks, it shatters into small, dull pieces instead of sharp shards. Most types of glass can be tempered, except soft-coated glass and carved decorative glass.
Laminated glass consists of two or more sheets of glass with inter-layer bonding, typically of polyvinyl butyral. When laminated glass breaks, the inter-layer structures hold the pieces of glass together, preventing injuries caused by falling or flying glass. Various types of glass, including energy-saving, sun-protection, and soundproof glass, are available laminated.
Safety glass is designed to prevent injuries from falling or flying glass. There are two types of safety glass, tempered and laminated glass, with individual subtypes of glass falling into personal safety classes F1–F3. Some types of safety glass can also have other features, such as energy-saving properties, protection against the sun, or soundproofing.