How to save copper coins

Question 1: How to preserve the collection and preservation of ancient copper coins should pay attention to the following points.

1, pay attention to the appearance

All collectors know that appearance is the life of a collection. Because copper coins are mostly pressed by machines, the patterns are subtle and delicate, but the lines are shallow and easy to wear, so it is difficult to find perfection. Therefore, to look at the appearance of a copper coin, we must first look at whether it is worn or not, and pay special attention to whether some subtle places are perfect. Secondly, copper coins are the most taboo to rust, which is completely different from some ancient coins. The rust of copper coins affects the appearance and covers its subtle parts, which greatly reduces the collection value.

2. Pay attention to version research.

The versions of copper coins are rich and complex, and each category can be subdivided into many versions, some of which are very rare, and of course there are many unknown versions waiting for people to explore.

3. Pay attention to the wrong version

There are many wrong editions in copper coins, such as English inverted sentences, Manchu typos, face mismatches, Yin and Yang coins, etc. So pay special attention to it at ordinary times. Start from where others don't pay attention.

4. Read more folk copper publications.

The collection of copper coins is indispensable for reference books such as the copper coin catalogue. Read more of these publications. Some publications are quite high-level, and some versions of copper coins are very detailed and the evaluation is more accurate.

Question 2: How to preserve and package ancient coins? Don't think that ancient coins are all copper coins, gold ingots and silver ingots. Since the Song Dynasty, ancient paper money began to appear and be used in circulation. From the earliest delivery to the widely circulated silver ticket, these kinds of ancient coins must be packaged in a single package. For currencies such as gold, silver and copper, the texture of these ancient coins is relatively soft, so it is inevitable that they will be damaged when they collide with each other. For currencies such as gold, silver and copper, the most easily scratched place is the embossed part, so in order to avoid similar situations, it is best to choose the packaging of the model matching the size of the ancient coins. For some relatively thin, small and tender ancient coins, you can use cotton wool, paper and the like as cushions. Of course, in order to strengthen the protection measures, special measures such as vacuum packaging and nitrogen filling can be taken to slow down the oxidation speed of ancient coins.

Prevent ancient coins from falling. Ancient coins made of precious metals will be bruised when they fall into the ground or touch hard objects. Even some ancient coins are completely rusted and will be smashed directly when they fall to the ground. In addition, playing with ancient coins too hard will also cause coins to break and break. These ancient coins are usually badly rusted and very fragile, and need special care and treatment.

Put it in a box. It is best to store ancient coins in dry paper boxes or hard plastic boxes, and put as much desiccant as possible around them. Of course, you can also go to the hardware store to buy some metallographic anti-rust paper and package it into small pieces. Each dollar is packaged separately to play a sealing role. For precious iron coins, it is recommended to use vacuum packaging, which is turned once every three to five months on average, because this way is the safest way to preserve ancient coins at present.

Don't destroy the old rust on the surface of coins. Some experienced coin collectors will find that the surface of ancient coins generally forms protective rust, also called old rust. Rust is hard, green, blue and red. These old rusts can protect coins to a certain extent, and it is best not to destroy them.

Handle with care. This requirement is especially aimed at bodiless coins. Generally, intangible money doesn't need any treatment, but it must be handled with care and never thrown away at will, otherwise the whole money will be broken at any time.

Ancient coins should belong to Tibet. The collection of coins should be kept according to the age and category. Because ancient coins with different textures have different requirements on temperature and humidity, they can be classified into drawers, or they can be stored in different coin books or plate-type coin boxes. Dry the coins before they enter Tibet to avoid being touched by sweaty hands. Coin cabinets, boxes and books should be kept in a dry and dark place to avoid rusting due to moisture. If it is paper money, it is necessary to prevent oil pollution and pay attention to mildew and moth prevention. In summer, especially after the rainy season in the south, you can take these paper money out to bask in the sun.

Toothpaste scrubbing. Of course, this method is suitable for coins made of gold, silver and copper in ancient times. They are metal coins. When stored for a long time, it tends to darken, which affects the ornamental value. In order to achieve the purpose of proper improvement, a small amount of toothpaste can be coated on the surface of these metal coins and then cleaned with water. You can also gently wipe the dirt that is not easy to remove in the cleaning process with a soft cloth prepared in advance, but try not to brush the dirt with a brush.

Isolate harmful rust. There are two kinds of rust on ancient coins. One is to protect rust, which is the old rust mentioned in the introduction of the fourth ancient coin preservation method. Don't destroy the old rust, because it plays a similar role in sealing and preserving ancient coins, but another common rust on ancient coins is harmful rust. As the name implies, harmful rust has an extremely adverse effect on ancient coins. When harmful rust appears on ancient coins, coins will basically rot in a very short time, which is very destructive. In addition, harmful rust bacteria also have the effect of infection. Therefore, when harmful rust is found in ancient coins, it should be isolated from other coins immediately.

Question 3: How to clean and keep copper coins? Remove rust with salt water or slightly corrosive liquid, and then store it in a dry place as much as possible.

Question 4: How to preserve old copper coins must be put in a dry place, and nothing else is important.

Question 5: How to store ancient coins? There are many kinds of green rust, even harmful rust will corrode coins.

Preservation method

Iron coins are often wiped with wax and placed in sealed bags or dry biscuit boxes to avoid touching anyone or wet places.

Copper coins are usually kept in a dry place, and they can be kept for as long as possible, which will damage their value.

Silver coins are sealed. Try not to come into contact with air, and don't put them in damp places.

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

Rust removal method

Qian Wen produced by corrosion can be soaked in strong acids such as edible vinegar and sulfuric acid. When soaking, turn it over at any time to observe that enough is enough, then wash it with water and a soft brush and dry it. Under normal circumstances, it is best not to use physical means to remove rust from ancient coins, otherwise even if they are cleaned, their appearance will be destroyed. Iron coins are easier to oxidize than copper coins, so we should pay more attention to protect the rust on the surface of iron coins, including the ancient colors handed down from generation to generation, otherwise it will only promote their corrosion and get the opposite effect. Besides, it is normal for ancient coins to have patina after a hundred years of vicissitudes. Why not? Copper rust is also an important point to identify ancient money, and it may depreciate if it is eliminated!

It is recommended to respect the laws of nature. (provided by BKJ)

Vinegar soaking method: wash the ancient coins, put them in a small dish, and pour a little vinegar until the coins are submerged. Take it out after 24 hours, brush off the residual rust with a small brush until the money lines are clear, then wash the vinegar with clear water and wipe it in the shade.

Soak in boiling water: sometimes ancient money will be covered with a layer of floating soil, but it will never be washed away. This kind of floating soil is actually a mixture of soil and copper rust. For this kind of corrosion, you can first put the ancient coins into the bowl and pour boiling water at 80℃-90℃ into the bowl until the coins are submerged. After 5 minutes, take out the money, brush the pattern and body of the money with a small brush, and dry it in the shade. When encountering ancient coins with serious soil rust, you can also heat the water to boiling to make the soil rust fall off.

Dry brush method: when the copper rust or rust is shallow, chemical means such as vinegar bubble should be avoided, and the money pattern should be cleaned by dry brush method. You can choose a large oil painting pen, and cut the brown hair on the pen tip to be only 0.5 cm-0.7 cm away from the root, so that the root is even and ready to use. First, put the ancient money to be brushed on the glass plate and fix it. If it is uneven, you can put some cloth under it, hold the root of the oil painting pen and brush it evenly. Pay attention to the force, or the effect will be bad. After the floating rust is brushed, rinse it with clear water.

Question 6: Preservation method of ancient coins At present, a transparent plastic bag is commonly used to preserve ancient coins, which has different specifications such as large, medium and small, and has many advantages such as easy preservation, small size, convenient carrying and viewing. However, because this plastic bag is made of PVC, its air permeability is poor, and water vapor is easy to enter in rainy days, which leads to humidity in the bag and corrosion of ancient coins, which greatly reduces the appearance of ancient coins. In addition, this kind of plastic bag has a small import and export, which is easy to cause direct damage to some fragile coins. Therefore, if you plan to keep coins for a long time, you'd better not use them. In addition, some people use foam plastic with pins or threads to save ancient money on cardboard, but it has many shortcomings such as large storage capacity, high cost and inconvenient carrying and storage. Moreover, the needle is made of iron, which is in contact with copper coins for a long time, and is prone to displacement reaction, rust water and pollution of ancient coins, so this method is rarely used at present. As far as surviving knives and cloth coins are concerned, they need to be stored separately, and there is no special storage device at present. A few collectors with deep pockets often ask people to make special storage devices, but the cost of opening a model is more than 1000 yuan, which is obviously too precious for small and medium-sized collectors. Ordinary people can choose some discarded cartons, such as knives and cloth coins, which can be put in longer ginseng cartons. It is best to add some absorbent cotton and sponge below to reduce friction. If you distribute coins, you can choose some checked cartons. Precious paper money is usually stored in round plastic boxes. There are many models of this plastic round box, so it's best to choose the model that matches the size of ancient money. For thin, crisp and tender ancient money, cotton wool, paper and other things can also be used as cushions. Rare treasures that are particularly precious are even rarer. In the past, some people used boxes such as mahogany and ivory to set off their own preciousness. Of course, if we are unconditional now, we don't have to follow suit. In order to strengthen the protection measures, special measures such as vacuum packaging and nitrogen filling can be adopted to slow down the oxidation rate. Because iron money is easy to be oxidized and corroded, it is best to store it in a dry carton or a hard plastic box, with as much desiccant as possible around it. If conditions permit. You can go to the hardware store to buy some metallographic anti-rust paper, put it in small pieces, and pack it separately for each dollar to play a sealing role; For expensive iron coins, it is best to use vacuum packaging. On average, every three to five months, you can pick a dry and sunny day, take out iron coins one by one to ventilate and turn over. Some ancient coins will be extremely oxidized due to their own copper problems or long-term exposure to wet and acidic environment, which is called bodiless in numerology. Due to the serious oxidation, money is crisp and tender, like a piece of tofu. Therefore, the money born out of the body is generally not handled, so it must be handled carefully, and it must not be thrown away at will, otherwise the whole money will be broken. Some pre-Qin knives and cloth coins are common because of their age.

Question 7: How to preserve Qing Dynasty copper coins? How to collect and maintain copper coins?

Generally, the rust color on copper coins should be kept as original as possible, because most of them are harmless rust. However, when the ancient coins are rusted into pieces, the coins are unrecognizable or have harmful rust, it is sometimes necessary to remove rust.

Soil rust is generally a mixture of soil and calcium and magnesium salts or a mixture of soil and copper rust. Before treatment, gently brush off the dirt on the ancient coins with a soft brush dipped in water, and then immerse them in glacial acetic acid diluent (glacial acetic acid is a colorless and transparent acidic chemical solvent, originally used in photographic darkrooms). After an hour, touch the copper coins with a small stick until they are scattered. Then put on rubber gloves, with a copper coin in one hand and a brush in the other. There is no need to wipe off the bronze rust on the back of ancient coins without inscriptions and marks, so as to maintain some characteristics of unearthed ancient coins. After rust removal, rinse off glacial acetic acid solution with clear water, absorb water with a soft towel or cloth, and finally lay it flat on clean paper to dry.

In the absence of conditions, rust can also be removed by soaking in vinegar. This rust removal method takes about one day and one night to barely dissolve the rust, which is extremely inefficient.

For powdery rust that cannot be removed by soaking, sludge can be used to wrap the rust removal part, concentrated acetic acid can be dripped into the dropper to decompose the rust, and the rust can be removed by gently removing the rust with the needle tip, scrubbing with water and neutralizing with ammonia hydroxide.

Fetal hair rust is a rust layer corroded by copper coins from the inside out. In this case, the money body becomes thicker, and most of them are sealed and stored without rust removal. More: National Culture and Art Network

Question 8: How can we keep old copper coins dry and away from corrosive substances?

Question 9: How should the collected coins be kept? Preservation of coins

In China, collecting coins has a long history. Since the reform and opening up, the popular collection of coins in the world is in the ascendant, and its status as the main collection has been recognized by more and more collectors. Due to the lack of knowledge introduction, communication and media publicity, some collectors are at a loss about the preservation of coins. It is often seen that many refined coins (proofs) were originally packed in airtight plastic, shining like mirrors, but what can be seen in the market is that they have been sealed and the mirror of the coins has disappeared, but there are many fingerprints or scratches. Some coins have been scarred beyond recognition after a period of exchange in the market. Although the coin is made of metal and has a certain hardness, it looks less likely to be damaged. In fact, it is not easy to keep coins. The appearance of coins is divided into 70 grades according to American standards. The correct preservation method should slow down or stop the corrosion process of coins, so as not to cause serious damage, and try to maintain the original appearance level.

Improper preservation often only adds a black spot with a scratch or the size of a needle hole that can be seen with a magnifying glass, which will make the coin drop by more than one grade, while a coin with a grade difference of hundreds or even thousands of dollars in Klaus' standard coin catalogue is by no means an individual. Keeping coins properly not only protects your collection, but also protects your assets. On the other hand, it is also to preserve the historical heritage for the next generation of society.

In order to preserve coins, let's start with the deterioration of appearance. The corrosion process of coins depends on the following factors: chemical stability (composition) of coin materials, materials in contact with coins for packaging, atmospheric conditions for storing coins and contact observation of coins. Generally speaking, gold is more resistant to corrosion than silver; Silver is more resistant to corrosion than copper; Metals such as zinc, aluminum and iron are easily corroded. For alloys, sometimes it depends on metals with more active chemical properties, such as pure gold, which has better stability. When copper is added to gold to form an alloy, coins are prone to black spots. But brass (copper-zinc alloy) is more corrosion-resistant than pure copper in the atmosphere. PVC in packaging materials is harmful to coins. At room temperature, PVC will gradually precipitate plasticizer to corrode coins, which will cause irreparable losses. We should pay enough attention to this, especially copper and copper alloy coins. In foreign countries, the harm of using PVC has been widely recognized as early as the early 1980 s, and this material has been eliminated in the packaging of coins and replaced by polyethylene. Water vapor, sulfide, carbon dioxide and other substances in the air are also very harmful to coins. For example, sulfur reacts with silver to produce silver sulfide, which turns the surface of silver coins gray and black. Moisture in the air will also accelerate the oxidation process of coins. In the process of appreciation, touch the bare coin with your hand and let the sweat leave fingerprints on the coin; Saliva and dust in the air fall on coins, and these attachments will accelerate the corrosion process of coins.

If you want to keep coins well, you must first choose a good packaging method, which is not only convenient for viewing, but also conducive to protecting coins, depending on your personal situation. Optional packaging includes plastic boxes other than PVC, polyester film circular hole paper clips, polyester film bags, paper bags and so on. Optional materials are polyethylene, polypropylene and polyester film. For the convenience of appreciation, it can also be put into the coin collection book on the basis of transparent packaging. The key is that you can't choose materials containing PVC to package and store coins, and its harm can't be underestimated. In order to isolate the air, there are generally two methods: closed and vacuum packaging. Air tightness refers to isolating the air, not pumping out the air in the package. Vacuum packaging will bring the packaging material into close contact with the coin surface, which may also damage the coin. Packaging adopts thermoplastic compression or ultrasonic welding, which has not been popularized, and is generally only used to package new coins of mint and graded coins of rating agencies. The easiest way to isolate the air is to soak coins in anhydrous alcohol. The disadvantage of this method is not easy to see, but the effect is good. Coins should be stored in a ventilated, clean and dry place.

Generally speaking, don't play with bare coins directly, especially don't touch refined coins, uncut coins or advanced coins. The place where the hand touches the coin must be the first place to corrode and turn black. If you really want to take and put coins, separate the edges of the coins with clean soft paper or cloth.

Coins generally don't need to be cleaned, especially they can't be wiped with ordinary rubber or glass fiber wiping rods sold in the market, which will scratch the surface of coins. If there is green mucus on the surface of the coin after packaging with harmful substances, it can be cleaned with anhydrous alcohol. For stains and fingerprints on coins, alcohol can also be used to clean them, which is effective for new traces and can prevent further erosion of coins by stains and fingerprints. For old traces, if necessary, you can wipe them properly with high-grade drawing glue without sand. For large pieces of dirt and special ... >>

Question 10: How to save old copper coins? Find a sealed and dry box and put them away. Generally, oxidation will damage cultural relics, and water molecules are also aerobic. Just keep them dry and sealed.