What is going on with bubbles on the ceramic cup

With the development of the times, ceramic cups have become an indispensable part of human life. The dazzling array of ceramic cup patterns is even more dazzling, but it is not difficult to find that there are some small bubbles on some ceramic cups. So how are these small bubbles produced? Today, the editor of our bone china manufacturer will show you what the small bubbles on the ceramic cup are all about. Bubbles are small bubbles caused by gas generated in the porcelain body or glaze. The reason for its formation is that the moisture and space gas in the glaze and the tire move through the high-temperature firing process and are blocked by the glaze surface. In this bubble layer, the size, number, and level layout of the bubbles are different due to changes in the porcelain material, kiln temperature, fuel and firing technology in each period. The life of the bubbles is protected by the tire and the glaze. In the life history of porcelain, the life of the bubbles is different due to the different conditions of the glaze. In normal storage, the life of the porcelain white porcelin dinnerware bubbles will disappear on their own. It is like a barometer, which is very helpful for us to identify ancient porcelain. This is also a scientific breakthrough on the basis of traditional methods of identifying porcelain. There are two types of bubbles: blank and glaze bubbles. Blank bubble, also called fetal bubble, is a hollow bubble with different sizes of protrusions from the underglaze body, which cannot be scratched by nails. The glaze bubbles are generally very small, bulging on the surface of the glaze layer. Such glaze bubbles gather at the edges or corners of the mouth of the product, commonly known as blister edges. Such defects are a common phenomenon in ancient porcelain. The reason for its production is that the tyre bubble is mainly because the blank contains too much organic matter, carbonate, sulfide and other harmful magazines. Or the mud is not uniformly kneaded, mixed with gas, or the firing operation is improper, causing harmful impurities to decompose and release gas that cannot be discharged in time before the glaze is melted. The main reason for glaze bubbles is that the initial melting temperature of the glaze is low and the vitrification is too early. Or improper firing, depositing carbon or decomposition products, failing to burn out or exhaust before the glaze melts, so the generated gas is wrapped in the glaze and cannot escape. Or there are too many soluble salts in the raw materials. When drying and evaporating water, they will be brought to the edges or corners, and they will melt earlier during roasting to prevent the escape of gas and cause bubbles.

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