Bat Trang is one of the oldest pottery villages in Vietnam. This is the place that produces many famous ceramic items in and outside the country. Bat Trang ceramics have many kinds of commodities: household ceramics, fine art ceramics and construction ceramics. Not only in terms of variety of species but also in variety of designs
In order to make ceramic glaze, it is necessary to have many materials and mainly stones, ores in the water are purified, crushed.
With each pottery Bat -Trang pottery artists have a way of mixing and reducing the various materials to create a unique glaze of each household.
Another very important factor is that the temperature of the kiln, which is only ten degrees centigrade, and that the amount of oxygen that comes in a little bit also makes the product with the same glaze comes in two different colors.
Enamel: This is the earliest appearance of glaze, mainly raw material, limestone, kaolin, sandstone and crushed stones in 70-80 hours.
Men decorated Bat Trang artists painted on the surface of decorative products. This type of glaze is heated by artists at temperatures between 1200 and 1300 degrees Celsius for making dishes, cups, and candles.
Reef Men: This is a very unique glaze, taking advantage of the shrinkage between the glaze and the ceramic bone, which creates cracks with enough sizes to be crushed and covered with the entire product and heated at a temperature.
After soaking, the crevices on the surface will be raised. This is a very famous enlightenment of the Bat Trang people.
White Men: White Men are mainly used to cover the product, rarely used to decorate. This is a regular enamel for tableware because it is heated at high temperature so the enamel surface is extremely safe to eat and safe for the user.
Moss Green: This glaze material is similar to a blue glaze, but uses other stones to create mossy green. This type of glaze is usually cooked at 1200-1300 C and is often used for decorating the texture of the product.
Brown Men: This is one of the first glazes in Bat Trang old brown enamel brown on the surface usually has a scabbard made of stones with high iron content, horn stone, It is made of high iron content.
Ceramic glaze is essentially glass, but the material is not exactly the same, as conventional glass can be stored in a stirred tank for homogeneity and defoaming. When melting is homogeneous without any mechanical assistance, the material must have no material that does not produce glass phase.
Therefore, it is essential first to create a uniform liquid flow at the desired temperature.
During the melting process and soon thereafter, the oxide in the glaze reacts with the ceramic bone surface to form an intermediate layer. This reaction is important because it affects the mechanical strength of the yeast, it depends not only on the chemical composition of the yeast but also on the individual oxide.
Therefore, it is necessary secondly that the chemical composition of the yeast should be similar to the chemical composition of the bone.
Cooling (cooling) occurs in contrast to heating (heating). If the thermal expansion coefficient of yeast and bones do not match, it will cause cracking or cracking.
Therefore, the third essential is that the thermal expansion coefficient of yeast and bone must match.
Melted men must be hard, smooth, glossy (except yeast mat). Besides, the transparency, colorless, shiny glaze of yeast is not always as desired. If the ceramic bones are colored, they must use chisel to cover the color of the bones. In addition, it is possible to make enamel (surface like wax), crystalline enamel and countless glaze colors.
Therefore, it is essential that the composition of the yeast must be adjusted so that the yeast possesses the desired physicochemical properties Vietnam pottery supplier.