Advice 1: How to distinguish Melchior

Cupronickel is an alloy of copper and Nickel, which has good mechanical strength. Externally, the Nickel silver is similar to silver, so quite often made of this alloy it is necessary to distinguish from silver.
How to distinguish Melchior
You will need
  • water;
  • - a cotton ball;
  • - lyapisny pencil;
  • - iodine.
Instruction
1
To determine silver the product is made of cupronickel or primarily view the subject for the presence of the sample. If there is the abbreviation MNC, is Melchior. On silver, as a rule, a conventional alloy consisting of several digits, as in any other precious metal.
2
Can be distinguished from cupronickel silver with plain water. In any container, pour water and put into it the study subject, leave it for a while. Then remove from the water and view. On the subject of, made of cupronickel, will appear greenish, the silver color will remain unchanged.
3
To distinguish Melchior you can smell. Smell to subject: if you feel the obvious smell of copper, so it's Melchior. To smell felt stronger, RUB your product.
4
Slightly moisten the surface of the object with wet cotton disc and Pocernice it lyapisny pencil. If the thing was made of silver, not a trace will remain. On the Melchior is formed a dark spot. In the case where the Nickel silver plated with silver, look for on the subject of worn out place and repeat the same procedure.
5
Rate the weight of the subject. Thing out of Nickel silver will prove easy.
6
To distinguish between these metals and using the iodine. Drip a little iodine on the product and put it for a while in the sun. Silver things will appear a dark spot. Although it will be difficult to clean.
Note
If you buy the silver thing for a very low price, it is worth considering. Most likely, offer you well crafted Melchior.
Useful advice
Often things of this alloy coated with silver, in this case difficult to determine what a thing is made. To understand what is in front of you is metal, it is better to seek the help of a specialist, for example, to the jewelry shop.

Advice 2 : How to distinguish copper

This kresowaty metal has many amazing properties. There are times when copper is difficult to distinguish from other metal. It causes a lot of curiosities. Copper has unique qualities peculiar only to it. Therefore, it is necessary to know how to distinguish copper from the other metals.
Billet copper
You will need
  • Copper wire, nitric acid, a product of gold, the product of bronze, hot water, salt, steel rod, measuring thermal conductivity
Instruction
1
Copper is easy to distinguish by their appearance. She has a reddish pink color and is very plastic.
Distinctive pinkish copper color
2
If you leave the copper wire for a long time under the open sky, you can see the discoloration.With long-term atmospheric impacts of copper is covered with a greenish film of patina. It protects the metal from corrosion.
The patina on the decoration of the fence. Italy
3
How to distinguish copper from bronze. Need to clean up small surface alleged copper wire and bronze, then water the bare area with hot salted water. Copper will acquire a darker shade.
Details of copper combined with bronze
4
How to distinguish copper from gold. If you put copper wire in nitric acid, it is completely dissolved. Nitric acid will acquire a greenish tint.
The copper in the flask with nitric acid
5
How to distinguish copper from the steel. Copper features high conductivity. To see this, it is necessary to heat the copper wire and the steel rod and compare the results with the help of conductivity meter.
A device for measuring thermal conductivity
Note
When determination of the thermal conductivity of the materials must be absolutely dry, so you need to remove all surface moisture.
Useful advice
On the properties of copper is very large influence, it contained impurities. When defining the properties of copper, should be aware of this.

Advice 3 : How to distinguish silver

Silver is a noble metal with a silvery-white color. Silver is relatively heavy: it's lighter than lead, but heavier than copper. Unusually yielding a reflection coefficient close to 100%. Over time tarnish, reacting with traces of hydrogen sulfide contained in the air, covered in a patina of sulfide. Has high conductivity and the highest electrical conductivity
How to distinguish silver
You will need
  • A needle or other sharp object magnet. For chemical testing (iodine, lyapisny pencil, special chemical reagent
Instruction
1
On jewelry of silver metal should stand trial. But even it does not guarantee quality – sample is easy to forge.
2
To determine the authenticity of the silver jewelry you need to hold it in my hand for a while. If your palms remain clean, then the silver quality. If dirty, then silver heavily diluted zinc, and therefore, over time, will quickly darken and deteriorate because of its brittleness. It should be noted that the quality of silver darkens with time, darkening it and cleaned with tooth powder or special jewelry cream. The darkening on the poor quality of the metal is not erased.
3
True silver has a high conductivity. To distinguish the silver should take it in hand. The product has to warm up quickly in the hands
4
Items from brass, offered under the guise of silver, easy to distinguish with a needle. As the silver film on the brass is very thin, it keeps badly and easily scratched. With a needle or other sharp object film is damaged and exposed the reddish metal (brass). Silver, this test is not scary
5
With a magnet to distinguish the true silver from the iron object, covered with a layer of silver. Pure silver is not magnetic.
6
Silver product darkens in reaction with iodine in the sun. To do this, put iodine on silver and hold it in the sun. Real silver should be covered with a film of yellowish-gray to black, depending on the sample.
7
The reaction of silver and spinnogo pencil quality metal slightly cloudy. Forgery in the form of copper (tin bronze, bronze, brass, cupronickel, Nickel silver, aurical, basilieva bronze) blackens quickly and rapidly, black and charcoal color.
8
Currently, you can buy chemical reagent: test for silver" and it is easy to distinguish real silver.
Note
When handling chemicals, be careful!
Useful advice
In case of further doubts about the quality of silver should include metal in Lombard. It quickly and reliably defined.

Advice 4 : How to distinguish fake silver

Silver jewelry can be worn at any age and in any setting. Silver also appropriate for a dinner party and in your office. Besides, it is beautiful, elegant and romantic. No wonder this precious metal so many fans. However, there is a downside to this popularity. Silver forge even more often than gold. But there are methods by which you can easily recognize the fake.

How to distinguish fake silver
Instruction
1
Twist the silver thing in the hands of a couple of minutes. Inspect the palm. If you touched the fake or low-quality silver with a large admixture of zinc, it will remain dark marks. Present high-quality silver of dark spots on the skin leaves.
2
Clean thoroughly the surface of small silver and masonite this place iodine. It is advisable to do it under direct sunlight. Silver darkens from the iodine in the sun. If the product does not have been no changes, then you are a happy owner of forgery.
3
Make a small scratch at some inconspicuous place silver pieces. If it is fake silver, a thin silver film slide and under it you see a reddish metal. However this method could only detect a fake made of brass.
4
Dip a silver ring in boiling water for just a second, and then gently touch him. If the silver thing is barely warm, then it's fake. Silver heats up almost instantly.
5
RUB the silver plain school white chalk. If Mel did not change color, at you in hands a fake. After contact with silver chalk black.
6
Move the silver piece to silver. If it's just fake metal, it will stick to the magnet.
7
Try to bend silverware, if, for example, a spoon or a thin lid from the box. Thing silver should be easy to bend and not bounce.
8
Smell silver ware. Silver has a distinctive and very specific smell. Fake metal strong odor not possess. But this method is only suitable for people with a good sense of smell and those who are not abused by Smoking.
9
Spread the product with a conventional sulfuric ointment. You can buy in any pharmacy. Wait a couple of hours, and then remove the ointment with a tissue. If the product has changed color or has acquired a reddish tint, then before you fake. Silver after sulfuric ointment black.
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