chesp wholesale jewelry Is there a cottage in the golden village, how is the fake?

cheap wholesale childrens jewelry Gold jewelry can be divided into two categories: pure gold and K gold in terms of gold content. The gold content of pure gold jewelry is more than 99%, up to 99.99%, so it is also known as "ninety -nine gold", "full gold", and "red gold". K gold jewelry is a jewelry made of other metals (such as silver and copper metals) to its golden materials, also known as "opening gold" and "color gold". Due to the number of other metals, different K numbers of K gold jewelry are formed. K数的大小与含金量如下：rn24K，99%以上；22K，91。7%；21K，87。5%；18K，75%；14K，58。5%；12K，50%；10K， 41.66%; 9K, 37.5% 8K, 33.34% 6K, 25%
In gold jewelry, pure gold jewelry texture is soft, teeth are bite, easy to bend, golden, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure, pure , Soft, heavy feel, heavy feeling. K -gold's head jewelry texture is slightly harder, the teeth bite the use of mintes, the color is yellow in yellow, and the number of K is reduced, the white increases, and the yellow is shallow. The feel of K gold jewelry is not as heavy as pure gold jewelry. In addition, both pure gold and K gold jewelry have a printing sign. Printing on gold jewelry is used "gold" and "KG" English letters represent the texture. When indicating the gold content, the word "99" or "24K" indicates that it is pure gold jewelry. The K gold jewelry is marked with the corresponding K number, such as the K gold jewelry marked "18K". %. In addition, the jewelry also marks the printing of the origin of different manufacturers. Really gold jewelry, printing standards, completeness, and clear, is an important identification of judgment.
The types of jewelry that is easy to confuse with gold jewelry, some are gold -plated jewelry, some are gold jewelry, some are copper jewelry, and some are copper alloy jewelry. The following briefly explain:
The gold -plated jewelry is plated on the surface of other metal jewelry on the surface of the metal jewelry. The color is similar to the real gold jewelry, the golden light is bright, and it is difficult to recognize. However, the gold -plated jewelry feels lightly, the texture is hard, the teeth are bitter, and it is easy to fade with a long time. Some gold -plated gold -plated jewelry, the color is either red or white, or flowers.
This gold jewelry refers to 24K or 22K gold foil on other metal surfaces, such as the KD number of K gold foil is too low, and its softness is poor. The appearance of the golden jewelry is similar to the real gold jewelry. The golden light is sparkling and it is not easy to fade, making it difficult to argue. However, if you carefully observe the depression, angle, back, etc. of the jewelry, you can find that the gold foil is uneven and there is a phenomenon of tilting edges. If there are broken joints on the jewelry, the cross section of the metal material can be seen from the outside. In addition, the feel of the gold jewelry is also lighter, the texture is harder than the pure gold jewelry, the teeth are bitter, and it is not easy to bend.
The copper jewelry color is yellow with red, fake, darker luster, soft texture, and light weight. Copper alloy jewelry (copper tin alloy), white color, hard and light quality, long -term coloring, will make the skin darker.
Whether it is gold -plated jewelry, gold jewelry, or copper jewelry, and Asian gold jewelry, it is generally not printed with gold jewelry. Or it is different from gold jewelry. If some jewelry is engraved with the English letter "GK", it means "gold plating". Or the signature traces are blurred and crooked. Consumers should identify whether there are printing, printing whether the printing is in compliance with the above provisions, and whether the printing is clear, etc. to determine the authenticity of gold jewelry.
The gold jewelry has many appraisal methods. The Chinese folk summarizes a set of simple methods. The formula is: look at color, 掂 weight, listening rhyme, folding hardness, stone grinding, contrast cards, acid dots, and color. The first four sentences depends on the eyes and the feeling; the latter four sentences need to be used by tools and reagents.
. Seeing color
Ben according to the different gloss and color of gold, you can generally distinguish pure gold, K gold, real gold, fake gold. That is, gold is better with red yellow, and the color is more than 95 %; the positive yellow color is about 80 %; the blue and yellow color is about 70 %; the yellow color is slightly gray and the color is about 50 %. Therefore, there is a formula for "Qiqing, Eight Yellow, Nine Five -Five Chi, and yellow leucorrhea ash." For jewelry that is first from Jiuzang, there will be a saying that "copper turns green, silver turns black, and gold will never change color."
. See the proportion
The proportion of gold is 19.32, which is about double the same volume of silver, lead, and tin. Otherwise, it is a non -pure gold or color difference in gold (this method has no destructiveness to jewelry).
. Folding hardness
Gold has the characteristics of ductility and small hardness, which can be pressed into thin pieces of 12.7 microns. When the color is high, marks can be left with large head needles or nails. More than 97 % of gold jewelry, after twisting two or three times, wrinkles appear at the bend, also called fish scales; about 95 % gold jewelry, feel hard when bending, the fish scales are not obvious; The jewelry is very hard when the bending is bent, without fish scales; gold jewelry containing more impurities, bend twice or three times to break; if it is made for raw gold, the bend is broken. When using this method, the width and thickness of the jewelry should be considered. The thick and width should be hardened, and the thin and narrow ones are softer.
. Listening to the rhyme, watching elasticity
When the high -quality gold jewelry is hit or throwing it hard, the dull sound of "dwelling, punching" is emitted, and there is no rhyme, no elasticity, and no elasticity. K gold has sound rhyme, sound, elasticity, the greater the elasticity, the more the rhyme, the more old, the worse the color.
5. Use the test goldstone to identify the color
The use of the gold -pairing card (the gold medal identified as a color) and the subject's first jewelry on the test gold stone to determine the color of the gold jewelry through the contrast color. This method should be carried out under natural light and sunlight, and cannot be carried out under the direct sunlight and incandescent lamps.
. Use acid dot
The golden roads that have been identified and paired on the testing stone, respectively, and test nitric acid on the golden road with glass sticks. , So the color is unchanged. If it is not gold or non -pure gold, the Golden Road disappears or changes. The law of changes is "three fast, three slows", that is, the low color disappears quickly, and the high color disappears slowly; Depending on the disappearance of its golden road, compare cards can determine the color of gold jewelry.

wholesale jewelry counter displays In fact, this is a chemical problem. Our junior high school chemistry teacher once said: Now the fake gold is copper zinc and gold, generally you can't see it. Zinc encountering dilute sulfuric acid will produce hydrogen. The phenomenon is to produce bubbles. And gold won't. Therefore, the most feasible method is to add dilute sulfuric acid to see if there are bubbles.