How to whiten virtual currency

1. Don't listen to others any more. I've experienced it myself. Fortunately, I have to go back. Don't worry

2. Now there are not many independent discs. The platform is trying to eliminate bubbles. Emerge in an endless stream of uneven in quality cat coins and Br in recent years, so we have to consider how to eliminate bubbles and how to achieve closed-loop platform. The following are common modes:
1 virtual currency trading platform + binary options
2 virtual currency trading platform + mall + crowdfunding
3 virtual currency + mutual aid + mall
4 split disk + entity
5 mutual aid disk + entity mall + Binary Options
6 trading platform + P2P lending

3. A lot of platforms, such as multi network and so on are good, please adopt!

4. Yes, have you heard of Dah? Dah is the investor of ETF (CN) project, a super blockchain trading platform, and its investor is Goldman Sachs.

5. In fact, there is no better way to solve the problem of virtual currency fraud. We can only collect evidence as much as possible to call the police and seek the help of the police, but most of the police will not put on file to intervene in the investigation. The most ideal solution is to negotiate and see if we can recover certain losses. Of course, it can also be exposed through the media channels, and some losses can be recovered under the deterrence of media exposure. If you need a private letter, you may be able to help
if you don't know much about virtual currency, it is recommended to go to bitcoin house to make up for it. If you want to play virtual currency, it is recommended to go to some virtual currencies with good application scenarios. Bitcoin is the originator of digital cryptocurrency, a small-scale social experiment; Dog Coin focuses on charity and small reward; Ruitai coin is an asset packaging system using blockchain technology; Thousand gold card is mainly used in mall payment.

6. The cleaning methods of old coins are as follows:
coins with dark, dark and dirty color are oxidized. First, soak them in boiling water, then squeeze some toothpaste on the coin surface, and then scrub them with soft cloth for several times
the coin surface has been oxidized. If the dirt is serious, it can be rubbed with a coin brush to remove the dirt and oxide layer and restore its original appearance
for the whole proct and modern coins, the surface of the coin only has a slight oxide layer, st, hand sweat, fingerprints, etc., which can be rubbed repeatedly with a rubber, and its surface will be as bright as new
coins with serious dirt and unclear patterns can't be removed by the above methods. First soak them in dilute hydrochloric acid for a few minutes, then soak them in alkaline water for a few minutes, then wash them with clean water, and finally brush them with coins
if the coins are of different procts, have been issued for a long time, and have been oxidized or rusted, soak the coins (except aluminum coins) in vinegar for a few minutes, then wash them with clean water, and then rub them with a coin brush (made of glass fiber) for several times to remove the impurities and dirt on the surface.

7. Generally, gold and silver coins can be treated with weak acid and alkali, while others are not recommended. Although acid and alkali can clean the surface temporarily, the corrosion of copper, nickel, aluminum and other materials will be very bad in the future

the most commonly used ones are detergent or soap, or boiling water for 5-10 minutes, but sometimes the effect is not obvious! This kind of method has less damage to the currency itself

cleaning methods of old coins

generally speaking, the cleaning methods of old coins are as follows:

1. If the coin surface is oxidized, and the color becomes dark, dark and dirty, soak it with boiling water first, then squeeze some toothpaste on the coin surface, and then scrub it with soft cloth. Repeat several times

2. The coin surface has been oxidized. If the dirt is serious, it can be rubbed with a coin brush to remove the dirt and oxide layer and restore its original appearance

3. The face of a modern coin is only slightly covered with oxide layer, st, hand sweat, fingerprints, etc. it can be rubbed repeatedly with a rubber, and its surface will be as bright as new

4. Coins with serious dirt and unclear patterns can not be removed by the above methods. First soak them in dilute hydrochloric acid for a few minutes, then soak them in alkaline water for a few minutes, then wash them with clean water, and finally brush them with coins

5. If the coins are of different quality, have been issued for a long time, and have been oxidized or rusted, soak the coins (except aluminum coins) in vinegar for a few minutes, wash them with clean water after taking them out, and then rub them with a coin brush (made of glass fiber) for several times to remove the impurities and dirt on the surface.

8. As a collection, the value of coins is closely related to the grade of its appearance and the degree of its perfect preservation. So if the coins are dirty or corroded, how should we clean the old coins
however, coins are cleaned in different ways according to different materials
generally, gold and silver coins can be treated with weak acid and alkali, but others are not recommended. Although acid and alkali can clean the surface temporarily, the corrosion of copper, nickel, aluminum and other materials will be very bad in the future
detergent or soap or boiling water for 5-10 minutes are commonly used, but sometimes the effect is not obvious! This kind of method has less damage to the currency itself
specifically speaking, the cleaning methods of old coins are as follows:
1
coins with dark, dark and dirty colors are oxidized. First, soak them with boiling water, then squeeze some toothpaste on the coins, and then scrub them with soft cloth, and repeat several times
2
the coin surface has been oxidized. If the dirt is serious, it can be rubbed with a coin brush to remove the dirt and oxide layer and restore its original appearance
3
the face of a full-length modern coin has only a slight oxide layer, st, hand sweat, fingerprints, etc. it can be rubbed repeatedly with a rubber, and its surface will be as bright as new
4
coins with serious dirt and unclear patterns can not be removed by the above methods. First soak them in dilute hydrochloric acid for a few minutes, then soak them in alkaline water for a few minutes, then wash them with clean water, and finally brush them with coins
5
if the coins are of different procts, have been issued for a long time, and have been oxidized or rusted, soak the coins (except aluminum coins) in vinegar for a few minutes, take them out, wash them with clean water, and then rub them with a coin brush (made of glass fiber) for several times to remove the impurities and dirt on the surface
for cleaned coins, you lovers must keep them properly. Only when you keep them well can you make your collection look more valuable.

9. Cleaning and preservation of coins

the surface of coins in the hands of collectors will always leave traces e to the age and circulation, such as metal blackening, corrosion spots and dirt. Some collectors want to clean the coins and restore the lost luster, which is very natural. Unfortunately, there is no way to completely restore the quality of old coins. Moreover, without the knowledge and experience of coins, cleaning itself will often damage coins and eventually destroy their appearance, making it impossible to recover by any means. In order to make sure which coins need to be cleaned and how to clean them, it needs some experience. Before you start cleaning your collection, you'd better do a few experiments with coins that are not used for collection. Only after you have gained some experience can you clean the coins that you are not satisfied with, in order to get relatively satisfactory results

1. Gold coin cleaning method

gold coin does not need cleaning. In case of soiling, just put it in warm soapy water to clean, and then rinse with water, put it in two soft cloth to absorb water. Friction action is not allowed under any circumstances, whether it is cleaning or sucking water. Even the soft cloth will leave tiny scratches on the polished coin surface

2. Silver coin cleaning method

the silver coin cleaning method first depends on the degree of oxidation and its fineness. The oxide formed on the surface of silver alloy with high silver content is different from that on the surface of silver alloy with low silver content

If coins with high silver content are placed underground for a long time, or are affected by other unfavorable factors, a thick layer of oxide will be formed on their surface. At this time, the coins should be soaked in ammonia solution for 1 hour (composition: 90% water and 10% concentrated ammonia). If there is no ammonia solution, you can also prepare sodium carbonate solution (dissolve 30 grams of edible soda in 100 grams of water) instead. Place the coin in the solution for several hours until the oxide is completely dissolved

if the silver coin with high silver content is only slightly oxidized, it is best to use ammonia solution, sodium carbonate solution and toothpaste to make a paste for cleaning. The paste should be soft to the touch and free from fine hard particles. The method is to apply it on the surface of the coin with fingers or a soft brush. After the oxide dissolves, rinse it with clean water

silver coins with low silver content using copper as master alloy will turn green when they are seriously oxidized. To clean this coin, it is better to use 5% dilute sulfuric acid solution. When the green rust layer is dissolved and retreated, the silver coins with high silver content are cleaned. However, if the oxide on the surface of the silver coin is very uniform, it is unnecessary to clean it

3. The cleaning method of brass coins

time often leaves a layer of oxide on the surface of copper coins, which is brown, dark green or black according to its environment and age. If the oxide is uniform and the metal is not corroded, it is best not to clean. Because of the uniform oxide layer, the copper coin has the appearance corresponding to its issuing age, and it is not easy to be corroded. For copper coins with uniform oxide layer, the only thing to do is to wash grease and sweat stains in warm soapy water. Do not scrub hard ring cleaning to avoid damaging the oxide layer

it is better to use a slow reaction solution (such as 5% dilute sulfuric acid solution) to clean the oxidized coins, which can graally wash away the surface layer of coins damaged by corrosion and keep the intact part from being damaged. The immersion time of coins in solution mainly depends on the surface state of coins: oxidation degree. The darker and thicker the oxide layer is, the longer the soaking time should be. Coins with serious oxidation can be soaked in the solution for several days and nights, while coins with slight oxidation can only be soaked for several hours. In the process of soaking, the dissolved oxide can also be cleaned with soft cloth in warm water, so that the solution can better act on the newly exposed rust layer. Cleaning should remember: to wear rubber gloves, use tweezers to hold coins in the solution to clean

after cleaning, the quality of coins can be improved, but we should be prepared for the corrosion pits and scratches exposed after cleaning. It is only after experience that a decision can be made: is the coin worth cleaning? Will cleaning damage coins? And after the coin is washed, will it be washed away with oxide to remove the tiny parts of the coin pattern< 4. The cleaning method of bronze coins is the same as that of brass coins. Apply a little toothpaste on the surface of the coin in advance and wash it in warm water to make the coin more glossy

do not use strong sulfuric acid or nitric acid solution to clean copper and silver coins. This solution will not only wash away the oxide, but also destroy the coin itself, especially the tiny parts of the coin pattern. If the bronze coin and copper nickel alloy coin are seriously corroded (the coin surface has uniform black, dark green oxide layer or thick black shell), it can be cleaned with strong sulfuric acid or nitric acid solution. Of course, this cleaning method is only for coins that have no special value

the cleaning process is as follows: pour nitric acid into the glassware, and prepare soda water. Put the coin into nitric acid solution with tweezers, and the oxide will be dissolved quickly. As soon as the surface of the coin is cleaned, pick it up with tweezers and put it into soda water. Then you can take out the coin by hand, rinse it carefully with warm water and wipe it dry. It should be pointed out that nitric acid can remove the oxide and make the surface of the coin numb

the cleaned copper coins look a little unnatural. As time goes on, copper coins will still turn black and oxide layer will reappear. However, we still can not guarantee that the copper coin will form a uniform new oxide layer, and the coin surface will not appear black spots. Therefore, it's better for the cleaned copper coins to naturally form an antique oxide layer, giving people a sense of age-old

the simplest way to make coins naturally proce oxide layer is to soak clean coins without grease in 10% dithionite solution for 10-20 seconds. Rinse and dry with a soft cloth. After soaking in bisulfite solution, the copper coin will give a pleasant bronze luster, and it will never be corroded again

the varnish on the surface of coins is helpful to the preservation of copper coins and copper nickel alloy coins. It's best to use glossy furniture varnish, which can be easily cleaned with acetone

before putting new coins (silver, copper, copper nickel alloy, brass coins) into the collection box, the place touched by your fingers should be cleaned. We found that corrosion always starts from the place where hands touch.

10. This friend:
if the commemorative coin is oxidized e to careless maintenance, it will definitely be devalued. The specific degree of devaluation needs to be based on the international currency classification standards.
as for the remedy, it is better not to clean it, because although chemical cleaning can obtain temporary effect, it will certainly cause more fatal damage to the coin over a long time, If you don't need to sell it, you'd better not use any remedy. If you need to sell it, you can use a soft rubber to gently wipe the surface oxide layer, so as not to scratch it too much.
whether the oxidized commemorative coins still have the significance of collection depends on such factors as the number of issues and the amount of existence of the currency. For the commemorative coins with a large number of issues, if the procts are oxidized, it has little significance of collection