Hermes jewelry with you jewelry questions Why the “aqua regia” capable of dissolving gold

Gold is not afraid of fire to burn. This is already well known. Gold was the chemicals in General. Also of the corrosion characteristics. However, the Gold if the encounter “aqua regia” would be dissolved. “Aqua regia” was a mixture of three on nitric acid and hydrochloric acid, and its reactions are:
HN08 (thick), +3HCI (concentrated) =NO + 3[C1]+2H:O Gold met chloro (Cl). Then as gold trichloride (AUC13) reaction is:
Au+3[C1]=AuCl3. We can know. “Chlorine” is the golden key substance from solid to liquid. Chlorine is a substance that has special effect on gold. If we do not “aqua regia”, using pure chlorine CI combined with gold. And heated to 200 ° c. Can also make gold from a solid to a liquid state. However, the chloride is a highly toxic substances, use is restricted.

Gold case is made of gold

Gold case, there are two. An alloy. Called gold case. Another kind of gold-plated or gold, collectively known as the gold-plated case. Both the specific identification method is that when I get on the case. Check any alloy tag, alloy tag which is digital (such as 12,14,18) and letter (k, g, f), if found to have numbers and letters, such as 12KG or 14k gold basically concluded that the alloy of gold casing. Gold case on imported watches of this type more common, most domestic watch less. See 14KGF,（Fake Hermes Jewelry Replica Hermes jewelry Replica Hermes rings Selling cheap jewelry）14kgild in the finished table. 14kgoldpLaiNg, mark, the casing is cash or gold. By the way. Some fake gold watches. In case the word 14KA or 12kgofA, but in fact is not gold. This case usually made a rough, gloss is very poor. Stamped numbers and letters were crooked. Another litmus test can also be used. There is another type of case. They look Golden and shiny. No alloy tag which, in most cases, this type of case is not gold.

Explaining the Hermes jewelry gold conversion

Calculate gold weight, internal and external methods are different. At present, the legal unit of measurement is “g”, frequently used are “ounce” grams in recent years in China, is in a relatively long time, “two”, according to the actual needs of readers now, and introduce China’s Gold unit and method. Gold’s “two” belonged to the old system of “two”, that is, people often say that the old scale 72. “Two” is the unit of “money”, “Sub”, “Li”, their binary relation is, pound-72, one or two folded money, our money is. One per annum.
With the increase of international trade, China import and export commodities is increasing, in order to make our weights and measures as far as possible in line with international standards, now. Strongly promoting the use of legal units of measurement. “Gram”, the old system of “two” with “gram” between the need for conversion, conversion is: 500 grams for a pound. At 72. “Two” gold weight is 31. 25 grams each of “money” at 3.125 grams of gold, and so on.
Of course, we accept a new unit of measurement, which is needed for some time. Therefore, our country is still appropriate to retain the old units of measurement, to facilitate the habits of some elderly customers. But as a national price measures are based on official Ji Jing
Lord, I hope that everyone gradually adapt to this standard. This avoids confusion with the other unit of measure, reduce conversion processes, computerization of the collections to lay the Foundation for the future, and as early as possible into the ranks of international standardization of measurement.

What is an ounce
“Oz” is “Oz” transliteration, it is English, “ouNe” abbreviation. At present, the international gold hit the market often used “ounce” in the unit. We often see in the newspapers from the price per ounce of gold $ xxx is this unit. Ounces measured at different objects have different weight standards, in addition to gold with Troy Division. Well as avoirdupois ounces and apothecary an ounce. Each Jin Yan oz with every one or two (72) compared the weight is closer. Every Troy ounce weight is 31. 103 grams per one or two is 31.25 grams, which is heavier than about 0.15 grams: every natural ounces of weight is 28. 35 g, every apothecary ounces of weight is 31. 103 grams (binary with Troy ounces).

Oz is a basic unit. Than its large and smaller units than it is what? British money smaller than a Troy ounce, the British Curry. Than it is the British pound. Conversion is: one pound equals 12 ounces. One ounce equals 20 pennyweight, a pennyweight equals 24-British（Fake Hermes Jewelry Replica Hermes jewelry Replica Hermes rings Selling cheap jewelry） Curry. Smaller than the avoirdupois ounce of British money, than it is the British pound. Conversion between a pound equal to 16 ounces. One ounce is equal to 16 Dram. Is smaller than the apothecary oz Dram, English letters Thiophene, gel. Is pounds greater than it. Conversion is. One pound is equal to 12 ounces. One ounce is equal to eight British money. One pennyweight is equal to three British Thiophene. A British Thiophene is equal to 20 British Curry. Avoirdupois ounces more for food, apothecary-ounce unit used in medicine. Over this three-ounce weight standards, to identify imported jewelry. Food, drug, and are very beneficial.