11 Facts About Glass

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 can be coloured by adding metal salts or painted and printed as enamelled glass.

Glass is sometimes considered to be a liquid due to its lack of a first-order phase transitionwhere certain thermodynamic variables such as volume, entropy and enthalpy are discontinuous through the glass transition range.

Glass objects have been recovered across the Roman Empire in domestic, funerary, and industrial contexts, as well as trade items in marketplaces in distant provinces.

Glass was used extensively in Europe during the Middle Ages.

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Glass is employed as the aperture cover in many solar energy collectors.

Glass is in widespread use in optical systems due to its ability to refract, reflect, and transmit light following geometrical optics.

Glass is typically inert, resistant to chemical attack, and can mostly withstand the action of water, making it an ideal material for the manufacture of containers for foodstuffs and most chemicals.

Glass homogeneity is achieved by homogenizing the raw materials mixture, by stirring the melt, and by crushing and re-melting the first melt.

Glass is an important material in scientific laboratories for the manufacture of experimental apparatus because it is relatively cheap, readily formed into required shapes for experiment, easy to keep clean, can withstand heat and cold treatment, is generally non-reactive with many reagents, and its transparency allows for the observation of chemical reactions and processes.

Glass is a ubiquitous material in optics by virtue of its ability to refract, reflect, and transmit light.