Tip 1: Is copper used in jewelry?
Tip 1: Is copper used in jewelry?
Copper is a metal that has long been known to man. Today it is widely used in electronics, automotive industry, as well as in the manufacture of jewelry.
Instructions
1
The main precious metals thatUsed for the production of jewelry, are gold, silver and platinum. But their physical properties do not allow the use of metals in pure form. Gold and silver are too soft materials, so products from them when worn would easily deform. Platinum, in turn, is a refractory and low-plastic metal. To improve physical and technological characteristics, copper and other additives are added to them. According to the percentage ratio of the precious metal to the mass of the whole alloy, the sample is determined.
2
Copper is a very malleable and sticky metal,Good conductor of heat and electric current. In addition to the physical properties of copper, for jewelry business, its characteristic reddish color is valuable. This allows you to embody various original artistic ideas in the manufacture of jewelry.
3
The main filler material in gold alloys -copper. This metal increases the hardness of gold, and also allows you to diversify the color range of products. It is the use of copper that causes the existence of yellow and red gold. In the alloy of white gold, copper is not added. When a silver alloy is added to a melt of gold and copper, the frozen alloy is well suited for forging and rolling. This alloy is harder than pure gold, but in comparison with it it is easier to melt.
4
For making silver jewelryCopper as an alloying element is also used. Pure silver has low values of hardness and wear resistance. With the addition of copper, the performance properties are significantly improved. But at the same time, the alloy acquires a yellow tint, and with a high content of copper, the product turns black.
5
Platinum is inferior in malleability and plasticityGold and silver. Simultaneously with the presence of high mechanical properties and corrosion resistance, it is difficult for a given metal to impart the desired shape. Therefore, in the jewelry business, platinum-based alloys are used that reduce the melting point, improve ductility and ductility, and increase wear resistance. Among the main additives that give these qualities, distinguish between copper and iridium.
6
In addition to alloys with precious metals, copperUsed in the manufacture of jewelry in pure form and in conjunction with simple metals. Copper is present in such alloys as brass (64-72% copper and 36-28% zinc), bronze (75-85% copper and 25-15% tin), tombak (85-90% copper and 15-10% zinc ).
Tip 2: Is there a combination gold
Jewelry art does not stand still. Today, the masters offer customers a variety of products from gold, characterized by elegance and originality. This precious metal does not cease to amaze with its diversity. In addition to white and red, there is also a combination of gold.
Instructions
1
The use of such an alloytruly exclusive jewelry. Not only is the color of the precious metal unique, but also the possibilities of its modeling. Combined gold produces strong products, in which you can send any stones.
2
Pure gold is too soft metal. It is not suitable for jewelry work, but it is used for seam welding in rocket building. For the manufacture of jewelry you need a more solid metal, which allows the master to put into practice the most daring imaginations. For example, the finest gold lace for anything not made of pure metal - it just crumbles in the process of work. Products made of combined gold are distinguished by their reliability and fineness of execution.
3
Classic yellow metal in jewelryUsed either with an admixture of silver, giving it a greenish-lemon shade, or half-and-half with copper. The more copper in the alloy, the more red is gold. Not for nothing is it called the red heart. This is the most common type of metal, used to be used for minting money. And today ornaments from red gold are very much appreciated in the East, where the cult of this metal has long been.
4
If gold is also present in copper (in largerQuantity), and silver (about 1/5 of the total amount of precious metal), it is called pink. Rose gold is used for not too expensive jewelry and jewelry.
5
White gold is obtained by adding to the alloyPlatinum, palladium or nickel. The last metal is an allergen. Therefore, products where nickel is present are not highly valued and do not differ in quality. The most expensive are jewelry made of gold with platinum. Sometimes jewelers, to give the products a pure white sheen, cover them with rhodium.
6
Combined gold is a mixture of red metal and white in various variations. The proportions depend on what shade the jeweler wants to get.
7
In addition, products made of combined gold are characterized by increased wear resistance. Especially if the alloy is dominated by copper.
8
There are also unusual types of gold: Green (alloy with potassium), blue (with indium), blue (with iron and chromium), violet (with aluminum). All these alloys are brittle and have reduced ductility. Therefore, they are not used for the manufacture of frames and self-adornments. Such compounds are sometimes inserted into jewelry, replacing them with stones.
Tip 3: What gold is best to buy
Gold is a chemical element, metal. It does not matter which part of the earth it was mined: in its pure form, it is everywhere the same. Alloys are distinguished, made by different jewelers according to their own methods. For example, a 750 sample of gold from Russia or Italy will differ in the composition of the substances added to the alloy.
Instructions
1
In Russia, gold is very popularWith a reddish tint. They encrusted the royal treasuries, painted palaces and interior chambers. The yellow color of gold is more appreciated in Europe and America, considering the noble lemon color of the metal itself. In fact, the color of gold depends on the impurities in its alloy. To get a lemon-yellow shade of the material, you need to add a little more silver. And if you increase the amount of copper in the jewelery alloy, you will get a reddish color. In addition, when heated, gold oxidizes and acquires a peculiar reddish tinge, for which it was called "red gold". It was believed that the metal of this color is the purest. Because, at the slightest fraction of impurities, it will not acquire such a shade. Given this fact, jewelers have learned to vary the shade of gold, changing the amount of copper and silver in its alloy.
2
Gold is very soft metal. Therefore, for the manufacture of jewelry and other things use its alloys. But ignorant buyers who want to buy products made of pure gold, push jewelers to trickery. They have to add copper and silver, without changing the color of the metal. Appearing at the gold a slight shade of none of the buyers does not notice.
3
Turkish gold: the price is quality. Loved by the buyers of Turkish gold is now losing its popularity. This precious metal in Turkey is not mined, but imported from abroad. It is made of inexpensive and low-quality jewelry. In order to reduce the cost of production, in the gold of Turkish jewelers added only copper, and silver in the alloy is missing completely. Gold of this quality is much lighter, but less resistant to weathering, so it quickly darkens.
4
Japanese and Italians prefer the highest sampleof gold. In Japan, gold items are a family heirloom, they are inherited. But jewelry made of pure metal is not suitable for permanent wearing, as they quickly break down. Therefore, they are worn in exceptional cases. More durable are alloy products, because they have higher strength. Despite this, in Italy, gold is used exclusively for the highest sample for making jewelry. Italians wear them only for holidays, but on weekdays they wear jewelry.
