Glass is a non-crystalline, often transparent amorphous solid, that has widespread practical, technological, and decorative use in, for example, window panes, tableware, and optics. Glass is most often formed by rapid cooling (quenching) of the molten form; some glasses such as volcanic glass are naturally occurring. The most familiar, and historically the oldest, types of manufactured glass are "silicate glasses" based on the chemical compound silica (silicon dioxide, or quartz), the primary constituent of sand. Soda–lime glass, containing around 70% silica, accounts for around 90% of manufactured glass. The term glass, in popular usage, is often used to refer only to this type of material, although silica-free glasses often have desirable properties for applications in modern communications technology. Some objects, such as drinking glasses and eyeglasses, are so commonly made of silicate-based glass that they are simply called by the name of the material.
Although it is brittle, buried silicate glass will survive for very long periods if not disturbed, and many examples of glass fragments exist from early glass-making cultures. Archaeological evidence suggests glass-making dates back to at least 3,600 BC in Mesopotamia, Egypt, or Syria. The earliest known glass objects were beads, perhaps created accidentally during metalworking or the production of faience. Due to its ease of formability into any shape, glass has been traditionally used for vessels, such as bowls, vases, bottles, jars and drinking glasses. In its most solid forms, it has also been used for paperweights and marbles. Glass can be coloured by adding metal salts or painted and printed as enamelled glass. The refractive, reflective and transmission properties of glass make glass suitable for manufacturing optical lenses, prisms, and optoelectronics materials. Extruded glass fibres have application as optical fibres in communications networks, thermal insulating material when matted as glass wool so as to trap air, or in glass-fibre reinforced plastic (fibreglass).

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  1. K

    Anong klasing screen protector ang ginagamit ninyo?

    Gusto ko lang malaman kung ano ang pinili ninyo at bakit? Salamat po!
  2. R

    The History of Mirror: Through A Glass, Darkly

    The History of Mirror: Through A Glass, Darkly The mirror has been in existence almost as long as humankind. By legend, the first mirror was formed in the ancient Himalayas when a little brook tarried to rest itself, as if to ponder and reflect upon its course. Thereby, in time, the first woman...
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    Help Eye glass with blue lens

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    Help Iphone XR LCD glass replacement

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    Help Mobile legends hour glass

    mga paps paano pa alisin tong apat na hour glass? masyado kasi nakaw pansin pag in-game na.
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    Help Gorilla glass 3

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    Mountains Made of Glass (Fairy Tale Retelling #1) by Scarlett St. Clair

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    Facts and Trivia

    Wine glasses can enhance the pleasure of drinking wine Despite the different shapes and sizes the most important feature was a large bowl, which universally enhanced the aromas of the wine by facilitating more surface contact with oxygen. An ample bowl also enables swirling of the wine, another...
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    Referral Tempered Glass for only 12 pesos

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    Halu mga kapuso! paano po kayo mag estimate ng drywall? anong materyales po ginagamit nyo?? Metal truck po ba saka metal stud? tapos po paano din kayo mag install ng glass panel,windows at doors?? may pinapa estimate kasi sa amin medyo 1st time haha. maraming salamat
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    Tempered glass

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    Closed Ceramic Glass or Tempered Glass?

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  17. F


    download iit here: > >

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