Holding hand how fast

 Identification of ceramics mainly in two ways: First, the traditional identification, commonly known as the eye school, based on the experience of experts, by virtue of seeing the hand touch and other means to confirm era ceramics, kilns, authenticity and value. Is based on the experience of experts in cultural relics and archaeological discoveries have confirmation of artifacts, contrasting shape, decoration, glaze characteristics after conclusion. This method is recognized around the world access, especially for mid-range of the following imitation, with virtually no mistakes. However, when using this method to identify high imitation works, expert opinion may diverge. In such cases, you can use another authentication method, namely technology testing. There are popular tech detection methods three kinds, one TL, can accurately detect ceramic baking time, the error is about 50 years, but this method requires sampling of artifacts can cause damage. Second, the non-destructive testing of ceramic glaze chemical composition, if you find modern chemical raw materials, can accurately determine its new and old. Third, non-destructive testing Devitrification coefficient glaze, this principle is not complicated technology testing, enamel is a layer of glass, and after the glass is generated, as the years disappear, will move toward non-glass transition, use of detection equipment, and By calculation, you can probably conclude porcelain firing era. This method is very effective against high imitation porcelain. But its limitations are only detect porcelain with glaze. These two means of identification is to identify methods of ceramic prevailing in the world today, the traditional combination of identification and technology testing can ensure error rate to a minimum. China's Ming Dynasty porcelain from the start there is appreciation, such as the five famous kilns are rated by the Ming Dynasty, and later, when the Ming and Qing Dynasties, the more of a kiln, kiln because it was a special nature was divided into three ranks porcelain, porcelain is first class porcelain kiln, two porcelain aristocrats used porcelain, third porcelain is exported porcelain, and later to the late Qing Dynasty after foreign museums awareness of Chinese porcelain than high, a lot of the time the five famous kilns of porcelains, even Yuan blue and white, have been buying foreign museums.