sorry I'm new to this kind of hoppies, but I managed to collect a lot of coins (silver and copper) from about 12 different countries, and I would like to know how to take care of them and clean them properly?
some of the copper coins had greenish material on thier surface, I want to know what sort of chemical reaction is that and how can I treat it and avoid this in other coins.
2007-06-23 02:59:44 · 6 answers · asked by the god father 2 in Games & Recreation ➔ Hobbies & Crafts
any answers please !!!!!!!
2007-06-23 04:22:36 · update #1
Dear Godfather :
1) I would like to know how to take care of them
=> You can store the coins using means like mylar 2X2 holders, flips, plastic capsules, or coin folders. Anything that is sulphur and PVC free. But none of these is airtight, so they are still subject to moisture and air pollution. No matter how you store your coins, take some time to look at them fairly frequently to catch any changes in their condition and take actions as soon as you discover any.
2) I would like to know how to .... clean them properly?
=> First of all, you do not clean coins. Anything that disturbs a coin's surface, whether through polishing or dipping in solution degrades the coin and affects its value. Just leave your coins alone. Natural toning and patina that are formed over a long period of time on the coins actually helps to protect the coins from further environmental damage and pollution.
3) some of the copper coins had greenish material on thier surface, I want to know what sort of chemical reaction is that
=> The green substance that you mentioned is a corrosive agent called verdigris. The substance actually eats into the copper. It's usually copper acetate, Cu2(CH3COO)4, or copper hydroxide, Cu(OH)2.
4) how can I treat it
=> The green substance has probably corroded the copper coins, so it's better to leave them alone as cleaning will only make them worse and less valuable than what it's worth. But if they're common coins and you would like to try removing the verdigris then I recommend solutions like Vitrolin(copper soap) or pure acetone(not the nail polish remover).
5) how can I .... avoid this in other coins.
=> Refer no. 1.
2007-06-23 04:33:08 · answer #1 · answered by silverpet 6 · 2⤊ 0⤋
When copper rusts it turns green to copper oxide by a chemical reaction involving water or moist air. Chloride containing materials can fimilarly oxidize the silver coins greenish or "tone" them. I would not recomment cleaning the coins with anything other than mild soap and water or WD-40. It is best not to clean them at all, because the decrease in value is greater from the abrasion is greater than from the discoloration. Store the coins in a dry box or bag that doesn't contain chloride or similar chemicals. You can read more about all this it you do search online for coin cleaning. Have fun collecting coins.
2007-06-24 12:23:57 · answer #2 · answered by Anonymous · 0⤊ 0⤋
The green slime is from the coins being in holders that had PVC in them. That is an item that is used to soften plastic to make it more pliable. It can really do a number on coins as well as other items. Soak the coins in acetone, then put in distilled water and let dry. You can get 2X2 staple-able holder from a coin dealer in a size that is close to the coin sizes you have. You can also use what is called a flip but make sure they are PVC free, they are usually called safety flips. They come with a cardboard insert so you can write the coin info on them. Go to brooklyngallery.com they are a large company that sells coin and stamp supplies at good prices, look at what they have to offer and go with the system you feel is best for you. If you need more help in this matter email me, I am always glad to help fellow collectors.
2007-06-23 12:45:43 · answer #3 · answered by Taiping 7 · 1⤊ 0⤋
there are various motives to assemble money, some do it as an investment, those everyone seems to be extra traders than creditors. creditors many times attempt to end a definite coin series alongside with Lincoln cents, Buffalo nickels, Jefferson nickels or Kennedy 0.5 money, will not be able to forget state quarters. It sounds straightforward in spite of the undeniable fact that it is not. they like a undertaking, yet no longer in basic terms like the more advantageous creditors do, for they flow after die styles of bust 0.5 money, great cents or maybe bust quarters. Then there are the historic previous people who love the great paintings paintings of historical money or the money from the various wars this international has had over the years. a individual who no longer in basic terms collects money yet in addition analyze them and is familiar with the historic previous of them is observed as a numismatist. no longer all creditors are numismatists. I assemble Oriental money for i like dragons, yet I learn them and learn the historic previous approximately them. i prefer to comprehend what grew to become into occurring whilst they have been first minted. I even have my in demand U.S. coin series that I assemble. Any coin with a historic previous gets my interest. it is yet some motives people assemble there are extra. this is a chilled interest and remember, it is considered the King of hobbies.
2016-10-18 11:13:05 · answer #4 · answered by ? 4 · 0⤊ 0⤋
hi im new to it to and the green stuff is mold you can get it off with metal cleaner and to keep them clean put in plastic coin holders
2007-06-23 16:02:23 · answer #5 · answered by ray s 1 · 0⤊ 0⤋
silver jewelry kleaner
kopper kleaner-liquid -not paste or solid.
sorry losing letters on my keyboard.
2007-06-23 05:04:57 · answer #6 · answered by ? 4 · 0⤊ 1⤋