It is commonly used in firing, such as quartz, feldspar, saltpeter, sodium carbonate and oxides of lead and tin. After firing, it can be coated on copper or silver objects to form enamel surfaces with different colors. It can not only prevent rust, but also be used as decoration. There are many kinds of classification of enamel technology, usually according to the production method and the type of tire land.
Lang, also known as enamel color, is commonly known as "burning green" in China and Guangdong, "burning blue" in Beijing and "burning seven treasures" in Japan. There are three main types of enamel: painted enamel, filled enamel and twisted enamel.
Enamel jewelry is very rich in color, with gem-like luster and texture, corrosion resistance, wear resistance, high temperature resistance, waterproof and moisture-proof, hard and strong, not aging and not deteriorating, and it will not fade or lose its luster after thousands of years.
Development and evolution of enamel products;
Enamel products reached their peak in the three generations of Kang, Yong and Gan in the Qing Dynasty, and then gradually became scarce after the decline of the country in the late Qing Dynasty and the war in the Republic of China. There is a product similar to enamel in the market, which is called "soft enamel" or "dripping oil ornaments", "dripping glue ornaments" and "baking paint ornaments" in some places. The surface looks like enamel.
But whether it is "soft enamel", "dripping oil", "dripping glue" or "baking paint", they are all organic compounds of plastic resin. This material is not durable, nor is it resistant to high temperature. It is easy to corrode and wear, and it will age, fade and lose its luster in a short time.
This plastic resin product does not need to be sintered in a high-temperature furnace, but only needs to be coated with liquid color glue and dried naturally or in an oven, so it is simple to make and does not preserve value.
There are several ways to distinguish enamel from imitation enamel: first, look; Because real enamel is an inorganic substance, its surface is as cold and hard as crystal glass, while imitation enamel is an organic substance, which is soft in nature, oily and plastic in surface luster and easy to scratch. Second, knife scraping; Scrape on the surface with a small blade, the real enamel is hard and not easy to scratch, and the resin-plastic imitation enamel is easy to scratch.
Third, fire; Burning directly with a lighter, imitation enamel is not fire-resistant, and the surface will leave burn marks, but the real enamel is intact. In a word, there are many ways to distinguish real enamel from resinous enamel, which is not difficult because there are essential differences between the two materials. Real enamel is an inorganic mineral, while fake enamel is an organic plastic.
Baidu encyclopedia-enamel jewelry