china
It derives its name from a shell pearl,
called in Italian "porcellana.
There are 2 kinds of porcelain:
The bone china:
Made of clay and limestone
a mixture of alumina, soda and potash.
It is relatively fragile and skate under the knife.
After the first firing = "smart"
it receives a "covered" leaded.
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| Bone China Plate XVIII |
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| TOURNAI, XVIII, white porcelain plate, blue polychrome and gilding. photo sale of Prestige Monday, 05/31/2010 the hotel sales Flagey |
Hard porcelain:
East invented in China during the Tang Dynasty (618-907)
and kept the secret of its composition until 1767 ...
This famous secret kaolin!
kaolin This assures that white,
is mixed with feldspar and quartz
which ensures durability.
This paste is formed by turning, molding or casting.
It undergoes a first firing to become "cookie".
then receives its coverage and should be annealed at high temperature.
The decoration of ceramics can be ways:
- either directly on the raw glaze and the glaze and decoration are cooked to a temperature between 850 ° and 1000 °
= great technique fire.
- those colors are placed on the already baked enamel then, the piece is returned to cook at a lower temperature which allows for elaborate sets and a wide palette of colors
= technique small fire.
- Gold is added after cooking and reapply for a new
at another temperature for the fix.
(all these successive firings justify the high price of a room)
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| platter hard porcelain, polychrome and gold . Manufacturer Faber - Brussels photo sale of Prestige Monday, 31/05/2010 the hotel sales Flagey |
china is much thinner, lighter,
to become translucent, an extremely white pulp and enamel smooth.
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