Glass


 * GLASS **

Glass is a hard, transparent and fragile material used in the construction and in the decoration. It is a mixture of silica sand, sodium carbonate and limeston with a temperature of 1500ºC.

In the ancient Rome was invented the blown one, technology that allowed the container’s production and window’s sheets. In the middle ages, it was to use for cathedral’s windows. At the end of XVIII century and in XIX century glass increased its use for the manufacture elements of good optical quality instruments, and also bottles, glasses and mirrors. In the century XX the manufacture’s technology by the floated on tin’s pools, this allowed to diminish the flat glass production’s price, its use being increased.

Its advantages are isolate the sounds, modifier of the internal climate and the control of the solar radiation and its disadvantages the glass must be cut to size before toughening, Damage to the glass will eventually result in the glass shattering into thumbnail sized pieces, The glass is most susceptible to breakage, Using toughened glass can pose a security risk in some situations.