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Freebase Commons Common /common

  • Glass is an amorphous solid material that exhibits a glass transition, which is the reversible transition in amorphous materials from a hard and relatively brittle state into a molten or rubber-like state. Glasses are typically brittle and can be optically transparent. The most familiar type of glass is soda-lime glass, which is composed of about 75% silicon dioxide, sodium oxide from sodium carbonate, lime, and several minor additives. The term glass is often used to refer only to this specific material. Silicate glass generally has the property of being transparent. Because of this, it has many applications. One of its primary uses is as a building material, traditionally as small panes set into window openings in walls, but in the 20th-century often as the major cladding material of many large buildings. Because glass can be formed or moulded into any shape, and also because it is a sterile product, it has been traditionally used for vessels: bowls, vases, bottles, jars and glasses. In its most solid forms it has also been used for paperweights, marbles, and beads. Wikipedia

Freebase Commons Visual Art /visual_art