Vermeil (pronounced ver-MAY) is gold-plated silver produced by one of two processes: fire gilding or electrolysis. Fire gilding was banned in the 1800s, since the process produced mercury vapors that caused blindness. Modern vermeil is produced using electrolysis and must meet U.S. Federal Trade Commission regulations (sterling silver coated or plated with a minimum of two and one half microns of not less than 10 karat gold) to be considered genuine. A professional jeweler may use precision sanding, acids and other procedures to remove gold plating. Do-it-yourselfers can use a less-effective home method that employs careful manual cleaning using particular cleansers and refurbishing materials.

1.Use a mild abrasive pad or small natural bristle brush. Briskly rub the piece of jewelry to remove all the gold overlay. If necessary, apply a paste made of baking soda and water to the pad to slightly increase the abrasiveness. Depending upon the ornateness of the jewelry, the process may take a considerable period of time and not be completely successful in removing the gold from all the cracks and crevices.

A quarter of non-ferrous industrial efficiency or are zero growth.

ferrous metals industry profit growth or down next year.

Hunan Nonferrous Metals Industry targeted output of 400 billion yuan.

Non-ferrous metal industry profit growth next year or down.

Hunan and East China Nonferrous Metals Exploration Bureau contracted address.

Ferrous metal plate or in the fourth quarter rebound.

MIIT a quarter of non-ferrous metal production of 8.1 million tons,up by 9.3%.

World Nonferrous Metal Museum - Hunan Chenzhou Mining Park Shizhuyuan show articles.

Intelligent integrated optimization control applied to the non-ferrous metal production.