wholesale gemstone beads for jewelry making Will pure gold bars change color?

wholesale price tags for jewelry Yes, if it is not kept, high -purity gold bars, gold coins, and gold jewelry will still change color change. This has a lot to do with the collection and maintenance methods. The nature of gold is relatively stable and it is difficult to corrode. Why does the high -purity gold bars change color? Experts from the Gold Jewelery Quality Inspection Center of Hangzhou Quality Inspection Institute said that although the purity of thousands of gold has reached 99.9%, there will be more metal components such as silver, copper, iron, and zinc in gold. After these metal oxidation or chemical reactions with other chemicals, a certain compound precipitation will occur, which seems to be golden discoloration. The Gold Jewelry Quality Inspection Center introduced that they often encountered the cases of gold bars, gold coins, and gold jewelry. There are rust spots in gold bars, golden turns, and black. Black turning is caused by copper and silver in the gold bars after a chemical reaction is generated and generated by copper sulfide and chlorine, while the white transformer is caused by the contact with the mercury (mercury) vapor in gold. Once consumers wearing gold jewelry went to the hospital to see a doctor, and accidentally broke the body thermostat. As a result, the jewelry became white after contact with mercury. There are more and more people who store physical gold at home. Golden jewelry experts suggest that gold should be stored in dark and dry places, away from kitchen and bathrooms. There will be polluted rooms. In addition, although the weather in Hangzhou is relatively humid, there is no need to deliberately prevent moisture in the place where the gold is stored, because the moisture -proof agent is volatile, and it is easy to produce chemical reactions after contact with gold. Some ladies are used to putting gold jewelry and cosmetics together, and the chemicals volatile of cosmetics can also cause gold jewelry to discolor.