GLASS+OP

1 **Concept **: is an amorphou (non- crystalline ) solid material. Glasses are typically brittle and optically transparent.

**Glass production ** involves two main methods - the float glass process, which produces sheet glass, and glass blowing which produces bottles and other containers.
 * Float glass ** is a sheet of glass made by floating molten glass on a bed of molten metal, typically tin, although lead and various low melting point alloys were used in the past. This method gives the sheet uniform thickness and very flat surfaces. Modern windows are made from float glass. Most float glass is soda-lime glass, but relatively minor quantities of specialty borosilicate[1] and flat panel display glass are also produced using the float glass process.[2] The float glass process is also known as the Pilkington process, named after the British glass manufacturer Pilkington, which pioneered the technique (invented by Sir Alastair Pilkington) in the 1950s.
 * Glassblowing ** is a glassforming technique that involves inflating molten glass into a bubble, or parison, with the aid of a blowpipe, or blow tube. A person who blows glass is called a glassblower, glassmith, or gaffer.