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What Is Crystal Glass?

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Crystal is a silicate glass containing various amounts of lead oxide.
Often markings on the product indicate the lead content.
The larger the lead quantity, the higher the quality of crystal.
Crystal is characterized by high transparency, good gloss and high density.
Crystalware in hand is felt by weight.
Strictly, crystal is called lead-potash glass.
Crystal glass, in which part of K2O is replaced by Na2O, and part of PbO is replaced by CaO, MgO, BaO or ZnO, called "half-crystal".
It's believed that crystal was discovered in England in the XVII century.
Crystal is a transparent glass, which has a special brilliance and purity, and is prized for its decorative beauty.
Unique luster crystal is achieved by the refraction of light in its sides - the same effect can be observed in the rainbow.
Crystal is similar to a diamond - its price is determined by the quality of the material, as well as the purity and perfection of cut.
History of the crystal The governor of Britain, Jacob I in 1615 vetoed the use of wood in any other industry, except for shipbuilding, and because of that the owners of glass furnaces were forced to switch to coal.
Next, the so called "scientific accident" occurred - it was discovered by the effect of bleaching the glass in a coal oven.
In 1676 the artist George Ravenscroft, striving for transparency of glass, created the original recipe with a mixture of lead oxide.
When you add it (the content of lead oxide - from 6 to 36 percent, the world standard - 24 percent) there are complex physical and chemical processes that result in formation of super stable compounds.
Such crystal is not destroyed by acid, alkali or alcohol-containing liquids.
Of course, this first Ravenscroft's crystal has not had all the signs of the perfectly clear, delicate and shining satellite of exquisite receptions and gala dinners.
However, after two centuries of British technical innovation, glassblowers crossed the English Channel and have found fertile refuge in France.
Crystal is a very soft material, so the traditional treatment for the crystal is a diamond face.
It is applied manually with a rapidly spinning disks of synthetic diamond and then polished by a chemical process using heated acids.
Crystal - a synonym for sophisticated style and chic - especially attracted royal personages and other significant persons, whose engraved monogram on the crystal dinner service illustrate an entire era in world history.
Crystal engraving decorate with small wheels, removing the superficial layers of glass, just blowing the dust off after the engraving is completed.
The phenomenon of endless fascination of crystal is hidden in the most randomly discovered nature of transparency.
Crystal, coated with a diamond face and colored with enamels and gold, combined with the talents of artists for several centuries, plays the role of magic crystal, fascinating people and continents.
To date, dishes of cut glass are still relevant and widely used for serving tables in many establishments.
Find out Why Wine Glasses Have Their Shape on Home Store Deluxe blog at http://blog.
homestoredeluxe.
com
.
Source...
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