The flexibility of high purity gold cuff links by the hard-hit or to throw

First, look at the different color according to the gold luster and color can generally distinguish between pure gold, K gold, gold, fake gold. Red yellow or gold to better than 95% purity; is yellow in about 80% purity; green yellow purity at 70%; yellow slightly gray at about 50% purity. The mens cufflinks was often built into a small natural environment, where the animals or insects seem still to be alive. Therefore, formulas for the "seven green, eight yellow, 1995 red, yellow and gray vaginal discharge in half gold." Early on for long if cuff is out, there are "green copper, silver black, Jin Zaiyong far color" argument. Second, look at the density of the density of gold is 19.32 g / cc, compared with the volume of silver, lead, tin, about twice as heavy. Available formula: the quality of some gold cufflinks than on some gold cufflinks volume  is equal to the density.
Obtained by measuring the density of gold cufflinks, a density of 19.32 grams / cubic centimeter or so was pure gold, pure gold or more, otherwise the color is not pure gold or in gold (this method of cuff links without any destructive). This sort of cufflinks has a long history. Third, the folding ductility and hardness, the hardness of gold with small features, can be pressed into the sheet thickness of 12.7 microns. Purity is high, carved with a pin or nail can leave marks. More than 97% purity of gold cuff links, two or three times after bending, bending at the wrinkles, also known as fish-scale pattern; 95% of the fineness of gold cufflinks, bending when you feel hard, fish-scale pattern is not obvious.
90% purity gold cufflinks, bending hard when there is no fish-scale pattern; containing impurities of gold cufflinks, bending down two or three times that; such as a living gold production, bend that is broken, sand-like cross section significantly. Texture of this kind of cufflinks is more damageable compared with the metal ones. This method should take into account the width of cufflinks with the thickness, thick, wide on some hard, thin, narrow it softer. Fourth, listen to phonology, see the flexibility of high purity gold cuff links by the hard-hit or to throw, to issue "despair puff, puff despair" dull whisper, and no phonological, no elastic, K gold with phonology, sound, There are elastic, the greater the stretch, the more sharp the more elderly phonology, fineness worse.
Fifth, the use of gold with a touchstone of brand identification fineness (fineness of gold have been identified) and cuff links were tested on the touchstone mill Road, by comparing the color to determine the fineness of gold cufflinks. This method should be carried out under natural light and fluorescent light, not in direct sun light and incandescent manner. The well-preserved “habitat” is always one of the most expensive types of cufflinks. Six points in the touchstone acid were identified, respectively, grind gold cufflinks and a brand channel, nitric acid test point with a glass rod in the Golden Road, Golden elements due to chemical stability, no reaction with acid, so the color change. Either gold or pure gold, gold road then disappear or to change. Variation is the "three fast, three slow", that the disappearance of low fineness fast, slow disappearance of the high fineness; mixed gold disappear fast, clear gold disappear slowly; large mixed gold disappear quickly, minimum miscible gold disappear slowly.
Golden Road, disappeared depending on the situation, more of the cards can be determined fineness of gold cufflinks. Silver is one of the most white metal, silver is Nver Shen ancient times people think, so much as with silver cufflinks. Another rare material of the cufflinks is black jade. Silver ductility after payment. It has strong sterilization ability, known as the "permanent fungicides." We often see in some of the TV drama to take needles for drug testing of lens, this is not an exaggeration, but true, because silver also has a "drug testing" effect.