(1) look at the color (also known as the face file) test: the higher the purity, the more white and silver, delicate and even surface light, there are touches. If it contains lead, the face file emits twilight flowers with a grayish-gray color; if it contains copper, the face file appears rough and rotten and has a dry feeling. Although the oxidized silver has “black rust†on the surface, its color is black and bright, and lead, tin, and cupronickel are not glossy, and its color is tinged.
(2) weigh Weight: silver density slightly larger than the average common metal, generally speaking:. "Aluminum light weight silver, copper does not light nor heavy" Thus Diandian weight of silver to make a preliminary determination whether its . If the jewelry is large in size and light in weight, the jewelry may be preliminarily judged to be other metals.
(3) check Hardness: low hardness of silver than copper, and more lead, tin large, so the surface of the swimmer with a little pin of the physical tests, such as needle slip surface difficult to leave marks, can be determined that copper jewelry; If it is a lead-tin texture, the traces are obvious and prominent; if there is a trace of a physical object and it is not so obvious, it can be initially determined as a silver ornament. Pure silver jewelry with hand-drawn, folding can make it deformed.
(4) Listen to rhyme: If the accessories are high-grade silver, then the throwing ground will have no sound and rhyme, no elasticity, and the sound will be “squeakyâ€. The lower the color, the lower the sound, the sharper and louder the sound, and the rhyme, if it is copper, the sound is more sharp and the rhythm is short and sharp; if it is lead or tin, the sound of the throwing is dull and short. No elasticity.
(5) See Crops given color: the silver jewelry cut open, see Crops color, if Crops silk white and cotton, jewelry surface smooth, fine, after oxidation of the surface color of black hair was bright, it can be concluded that a fineness of about 98; if Crops thick and soft, red microdisplay, fineness of about 95; Crops with white and gray, slightly reddish at the coupler 90; hard hand bend, or grayish reddish Crops which fineness of about 80; coupler 70 About silver, the surface of white and yellow, dry, red gargle, yellow, bending hard; if the lipstick with black, yellow with black, the color has been below 60.
(6) forging silver features: producing forged silver is generally copper, brass, nickel silver, lead, tin, aluminum or the like, which is characterized by: Red Copper: appearance purple, dark red Crops, raw green embroidery. Brass: yellow appearance, green beans, green embroidery. White copper: appearance gray, gray brick, green embroidery. Lead quality: grayish blue, soft, and traces can be drawn with nails. Tin: silvery white, soft, with nails can be traced. Aluminum: white gray, soft and light.
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