Gold and silver vessels occupy an important position in historical relics and are an important carrier of Chinese traditional culture and art. Gold and silver are precious metals with moderate hardness, ductility, easy hammering, bright natural color, and oxidative discoloration. They are good materials for making crafts. Since humans discovered and recognized gold and silver, they have processed them into various gold and silver products. Gold and silver products have appeared in the Shang Dynasty, and there have been gold and silver inlays in the Spring and Autumn Period. Gold and silver utensils appeared late, rare before Han, and only began to discover more in the Tang Dynasty. Gold and silverware has always been an important category in the collection field. Both gold and silver are rare precious metals. Compared with other materials, gold and silver are easy to process, so that gold and silver can be processed and refurbished to form various forms of gold and silver products. Both gold and silver have the characteristics of resistance to atmospheric oxidation and corrosion. They can still be brightened after thousands of years. Therefore, many gold and silver products have been passed down from generation to generation and become treasures of the world. Collection: Chong ancient color The collection of gold is of course the better, the bigger the better. However, gold is different from bronze and iron, it is not easy to corrode, and it is not easy to distinguish the age from skin color and oxidation. Therefore, the gold collection only infers the authenticity and age from the characteristics of the shape and the ornamentation. There are many silver, copper and iron in ancient gold. The more silver, the more pale yellow; the copper-containing ones are pale yellow and slightly greenish. If the soil is long, it will be chestnut-yellow; the gold containing iron is generally rose-red. Nowadays, most of the antique dealers use the mouthpieces of "Qiqing, Bahuang, Jiuwuchi" to identify the color of the ancient goldsmith. The color of the gold can also be determined by the following methods: the gold density is larger than that of the ordinary metal, and it is heavy in the palm of the hand; the bulky and light gold is the fake. With two gold bars, the gold with a gold content of 99.9 or more has no sound; the silver has a soundless sound; the copper contains a long sound. The high-quality gold is softer, and the lower-quality gold is harder. Gold is silver, and gold is harder. The identification of silverware is generally judged according to the shape, decoration and oxidation degree of the utensils. Maintenance: anti-corrosion and anti-oxidation Gold and silverware should reduce damage to the coating such as acid and alkali. Since the hydrogen and sulfide contained in the air and food tend to blacken the silverware, it should be washed with warm water and detergent as soon as possible after use (do not use bleach, detergent or other chemicals when cleaning), and use soft after washing. Dry the cotton cloth. Store in cloth or paper, and store separately in a dry place free of sulfur and fumes. After long-term use, if the surface of the gold and silverware is oxidized, the washed gold and silverware can be immersed in salt water or soda water with aluminum foil or aluminum sheet and temperature of about 78 ° C for 1-3 minutes, and then coated with sponge or cotton cloth. Dry the brightener. A good brightener forms a transparent protective film. If spots appear on the utensils, first wipe them with a cloth dipped in vinegar, then clean and dry them; or wipe them with half of the onion sugar and wash them to dry. Identification: two aspects The authenticity of gold and silverware mainly includes two aspects, one is the identification of its material texture, and the other is the identification of its manufacturing age. According to the current scientific and technological means, the identification of the texture of gold and silver can be made more accurately. The identification of the texture of gold and silver materials has accumulated some simple and easy methods from experience. First of all, the density of gold is large. Generally speaking, for metal objects of the same volume, gold products are much heavier, and products that are too light must be fakes. Secondly, gold and silver have small hardness, soft texture and strong ductility. The metal object is gently stroked on the gold and silver products, generally leaving the dent as the genuine product, leaving the scratches as fakes; again, the chemical properties of gold and silver are relatively stable, especially gold, which is not easily oxidized in the air. Copper and iron products are easy to oxidize and rust. Gold has a constant color in an acidic solution, and copper products lose their luster when exposed to nitric acid. If it is gold-plated, the surface of the gold plating is easy to fall off, not only the detached part is easy to rust, even if the gold-plated surface is easily covered by copper. Of course, when the ancient gold and silverware were unearthed, some of the surface was covered with copper rust, especially silver. This situation is due to the fact that the gold and silverware was exposed to other corroded copper before being unearthed, such as being buried with the bronzes and contaminated with copper rust. Another reason is that the texture of most silverware in ancient times was a copper alloy containing a certain composition. When copper was oxidized and etched, a copper rust coating layer was formed on the silverware. However, most of this situation can be treated by descaling to restore the original appearance of the utensils. In addition, experienced people can also distinguish the authenticity of gold and silverware by the sound, taste, color and feel of the utensils. However, this requires an accumulation of rich practical experience. In addition, unlike the forgery of ancient copper, jade and other artifacts, the most common form of counterfeit gold and silver is to falsify the material texture, mostly for the purpose of seeking high profits. It is still rare to be a pseudo-person in the age. This also leads to the identification of the gold and silver ages. It is insufficient in theory or practical experience, and lacks systematic research and experience summarization in this respect. Ladies Tops,Ladies Tops Shirts,100% Cotton Ladies Tops,Ladies Tops For Spring Shaoxing Haisa Textile And Garment Co.,Ltd , https://www.haisafashion.com
