The problem that often occurs in the gold jewelry
Quickly become dull or black. Caused by a less than perfect blend of time making jewelry that is usually done hand or ‘hand made’ difficult to treat because it will surely fast black again.
Dull or black when not in use. Usually stored for long periods in wooden cabinets. Varnishes and wood finishing less than perfect can make this quick dull and black due to silver oxidation by wood finishing materials.
Dull also be caused by bathing in sea water containing salt or sulfur. Gold often with salt and sulfur oxidation.
Dull and black can also be due to storage in a bag or something made of leather. Genuine leather jobs typically using materials associated with sulfur or amoniac. Or maybe you use a necklace of silver skin. Not all black skin causing skin if the job was done right. So the skin is suspect as the cause of black gold items.
Gold changed color to red too. This is because copper compounds which have emerged out of the surface. This law of nature that the light is always on top. The reason is because the mixture of levels could be incorrect. But if from the beginning of this reddish color is called rose gold.
Red that appears uneven. This problem is called a cloud or fire skill. This is because when there is a process of soldering in areas that appear red. This mix is one of them is soldered copper surface.
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