Does wrapping silver coins in plastic wrap prevent oxidation

Sealed, try not to come into contact with the air, and do not put in a humid place.

Because it comes into contact with air, it is easy to oxidize silver.

It is recommended to put the coin in a special box for coins, and it is recommended to cut the four corners of the original seal, and then put a desiccant (such as a bamboo charcoal packet), and then put it in an airtight container. Although not as effective as graded coins (the longer the time, the farther the difference), it is much stronger than paper clips.

The wardrobe is not sealed, and the desiccant is equal to not put. It must be placed in a relatively sealed environment. In addition, if it is placed together with clothing, due to the complex chemical composition of clothing, it will release gases that have a corrosive effect on ***, and you need to be vigilant against the adverse effects of gold and silver coins.

In addition to the selection of desiccant, there is no other substitute for discolored silica gel, which has the strongest hygroscopic energy efficiency and the most stable chemical properties that can indicate the hygroscopic life. Bamboo charcoal has a very poor moisture absorption effect (perhaps not at all).

After many years of testing, the hygroscopic effect of bamboo charcoal is OK, although it is not as good as the effect of silica gel and can indicate the effect, but the advantage of bamboo charcoal is that it not only absorbs moisture, but also can effectively adsorb harmful gases. My coins are put on the bamboo charcoal bag and then put in a sealed iron box (the bamboo charcoal bag is regularly replaced and dried), the effect is good, first, the appearance of red spots on modern gold coins or white spots on silver coins, may be related to the minting technology of some mints, the purity of gold and silver, climate and environment or storage, because even if it is unsealed, it does not mean that it is sealed again (it is recommended to use another plastic sleeve to seal it again), which highlights the advantages of graded coins; For example, the CITIC Sun Statue 23-Year Sail Silver Coin has been minted for more than 70 years, and generally speaking, there are few oxidation phenomena and no white spots, and the silver is still as strong as new (as shown in the 2010 reviewer), while the Panda Silver Coin has been issued for a short period of time but has white spots, which may be related to individual coinage techniques or methods.

2. Important gold and silver coins are submitted for evaluation immediately after issuance, and can generally be rated MS70 or MS69, when the protection is the greatest, and the silver coin appears white spots or oxidation after grading, that is, it is not due to artificial conditions, and its grade is not affected;

Be sure to ensure that it is not wet, otherwise using plastic wrap will be counterproductive, it is recommended to wrap it in foam paper, and then place it in a cool and ventilated place.

In fact, there is no need for special treatment. Generally, merchants who sell silver coins have potions that can be washed off, and if you sell them, the general merchants will not find this problem. Unless it's a problem with the quality of the art market.

OK. Because plastic wrap keeps out oxygen.

It is okay to keep it in the refrigerator for a short period of time. But after a long time, it will not work.

The formation of silver dollar toning is mainly formed by chemical reaction with substances and air in the surrounding environment. The old silver dollar sealed in plastic wrap will not change further except for a very slight reaction with the residual oxygen in the seal.

Picture: A silver dollar in this state, after being sealed with plastic wrap, will not change much for a long time.

My neighbor brushed the Guangxu ingots with a laundry brush today, sparkling.

Sealing old silver dollars with plastic wrap will not grow tony.

1. The precious circulating commemorative coins should be packaged and preserved in a single piece. "The 40th Anniversary of the Founding of the People's Bank of China" commemorative coin, the circulation is small, only more than 2 million, its market ** is also the highest, this coin is very precious; Although the coins of the 6th National Games are issued in large quantities, they are easy to oxidize, and the full quality is rare. Both types of circulating commemorative coins should be kept separately.

2. For the commemorative coins that have been oxidized, you can add a small amount of toothpaste, scrub gently, try not to use a brush, remove the oxide layer, and put it in a sealed container for storage. In short, as long as the collector is careful when collecting and circulating commemorative coins, it can ensure that the commemorative coins are in good condition.

3. It is not advisable to touch the commemorative coin often with your hands. Circulating commemorative coins are very beautifully made, and many collectors can't put them down, but if you often touch the commemorative coins with your hands, the surface of the commemorative coins will leave sweat stains and other substances, making them easy to oxidize. Collectors can use philatelic tweezers to pick up commemorative coins.

Fourth, it is not advisable to put the commemorative coin in the circulation commemorative coin locator book for a long time. The best way to prevent the oxidation of commemorative coins is to place them in oxygen-free, water-vapor-free conditions, but this is difficult for ordinary people to do. The circulating commemorative coin locator book does not isolate the commemorative coin from the outside air, and in humid weather, the moisture on the surface of the commemorative coin is more difficult to volatilize, so the commemorative coin placed in the locator book does not take two years, and it is often all oxidized to gray.

A good way to do this is to seal the coins one by one with a banknote jacket and place them in a used iron candy or cookie box at home. If possible, you can also use an oxygen needle to remove some air from the box.

The storage of gold and silver products, gold and silver jewelry, gold and silver commemorative coins is mainly to prevent oxidation and isolate the air, the following methods can be used for reference.

First, gold and silver jewelry can not be put together without isolation, that is, ** jewelry and sterling silver jewelry should be packaged separately, gold and silver are directly mixed together will undergo a physical replacement reaction, and silver ions are easy to run to **jewelry, affecting the color of gold** surface red spots.

Second, gold and silver commemorative coins should be sealed with professional acrylic when preventing, which can effectively isolate the air.

Third, gold and silver products should be placed in a dark and dry place to avoid photo-oxidation.

It is possible to wrap a coin to prevent oxidation, but replace it for a long time to prevent adhesion.

If you are afraid of mold, it is the safest to put the bank, and if you collect, you can buy a coin book.

You can wrap it, but you can't locate it.

It depends on the composition of the desiccant, the desiccant has strong oxidizing properties and can oxidize silver, and there is no oxidizing property and will not oxidize silver.

Generally not, silver stability is very good, mainly depends on what type of desiccant it is. None of the common desiccants react with silver.

No, the desiccant is mainly calcium oxide, silica gel, etc., none of which can be oxidized.

It needs to be protected from moisture (the recommended humidity value is 40%-50%), i.e. dry, and do not come into contact with items that will oxidize (chlorine, sulfur).

The high-cost method, each coin is used for NGS oxidation, and the cost method is used to do NGC grading, and the electronic moisture barrier box.

Low cost hair, color-changing silicone + sealed box can also be in + food vacuum bag.

Oxidation is inevitable, it's just a matter of time, and the main focus is on hard injuries and white spots.

The chemical properties of silver are still very stable, as long as you don't let it go to a place where the SO2 is very heavy, there should be no problem, don't be too nervous, you don't live near the volcano, it's not a big problem.