wholesale portable jewelry showcase displays
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wholesale portable jewelry showcase displays
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jewelry epoxy resin silicone molds wholesale 18K Rose Gold Ear Ear is a symbol of faith, loyal to you.
The fading of gold ornaments
rusting treatment
The chemical properties of gold are very stable, but there may also be discoloration and fading. The gold jewelry faded into white under the premise of qualification, and it may encounter mercury. Some cosmetics have mercury ingredients. Gold jewelry will also combine with mercury in sweat stains and laundry fluids to form mercury gold compounds. In this case, as long as you get the gold shop high -temperature treatment, you can recover.
As for the black jewelry, it depends on the specific parts. "Due to the requirements of the production process, the buckle needs to have certain elasticity, but it cannot be used for thousands of gold. According to the national standard, it must be gold with a purity of more than 900. It is also normal.
For the golden ingot of "rust", some purity and gold ingot, gold ingot, "rust" on the surface is not unusual. It is mainly because gold is not clean during production and processing, such as suppressing gold bars, such as suppressing gold bars. In the process, bring the dust and other substances in the process. After storage for a period of time, the oxidation effect is generated under the conditions of light, air and other conditions, and it will form a rust spots. This spots can be removed by professional cleaning.