A flowers in vase / Specialties of Korea / Hand Made !

Description

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A flowers in vase / Specialties of Korea / Hand Made !
Use : A vase of flowers !
Height : 150 mm
Diameter : 95 mm
Weight : 511 g
Material : Ceramic
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The characteristics of  pottery
White pottery is made of silica sand (silica, silica, quartz) and
aluminum oxide as the
main
component, and is coated with
lignite of feldspar (1,300 ~ 1,350 C)
It is pottery .
The soil is pure Korean and is also called tattoo or white soil ,
and the lye is also Korean ,
usually called glaze .
There are many kinds of minerals in the gut and glaze , and
iron is the biggest factor that
determines the color of white pottery .
In order to produce a good white pottery , it is necessary to select
raw materials of glaze
containing no impurities such as iron , or to
select a raw material containing a minimum
amount of iron and defecate
the iron to remove impurities such as iron .
A very small amount of iron in the gauze in the atmosphere and in the kiln ,
according to
the following approximate color development .
The ferric oxide has brownish or yellow is
color when the atmosphere in
the kiln is oxidative fission (oxidative burnt) to the end ,
and a whitish or
blueish color when the atmosphere in the kiln is the final reduced firing
(reduced burnt) .
If there is a large amount of oxygen , the trace amounts of iron contained
in the gut are
oxidized and become ferric oxide , which is rusty .
Therefore , depending on the content of iron , brown or yellow color is
formed .
When oxygen supply is cut off , The original color of the iron becomes
blue ,
and it
be comes a blue or blue color depending on the content of iron
.