Cleaning Coins Cleaning coins is best left to professionals who are trained in this matter.
Get your copy today! We all are used to touching and holding coins. You pull out a handful and spend them, or pay for something and put the rest back in your pocket or purse. How did you hold the coins you used? Most likely you made one of the most common of mistakes in handling coins for a collection.
You held the coin between your thumb and finger, pressed on the front and back of the coin, what collectors call the obverse and reverse of the coin.
If you touch a coin like that, it is generally not a problem, since most circulated coins show obvious wear when you look at them.
However, for an uncirculated or proof coin, you just damaged the coin. The natural oils in your skin will etch a fingerprint or a thumbprint into the surface of the coin in a matter of minutes. Always hold a coin by the edge, never the faces.
To prevent damage to a coin you are examining, hold the coin by its edges with your thumb and forefinger. Handling coins this way is good practice for when you hold rare of valuable coins.
If you are working with upper-grade, uncirculated or proof coins, a pair of lintless cotton gloves is strongly recommended. Latex or plastic gloves are not recommended because they often have powder or lubricants on them that may damage the coin.
Also, consider placing a thick, soft cloth under the coin as you are holding it, just in case you slip or drop the coin.
This will prevent damage to the coin that might come from it impacting a hard surface. Family or friends may want to touch the coins in your collection. You can either warn them not to touch the coins, or show them how to properly handle them.
Another possibility would be to put the coins in holders that protect the surface of the coin. This allows for easier handling, and can provide protection from damage that might be caused by an accidental drop.
Not only is this a negative test, it will also cause damage to the coin, since the test involves dropping the coin on a hard surface. This is a negative test, because the slightest fissure or internal crack in the coin will make it sound like a lead washer. Weighing the coin will tell you as much, or more, about the coin, and weighing is a non-destructive test.
The damage done will often cut the collector value of the coin in half, or worse. The whole basis of collecting coins revolves around protecting and preserving that mint surface. There are two types of cleaning for coins, often confused with each other.
Destructive cleaning uses abrasives or acids to clean and alter the coin surfaces. Destructive coin cleaning will reduce the collector value as much as 50 percent or even more.
An expert can, in some cases, improve the value of an old coin by cleaning, but for the average collector the risk of damage is too great, as almost anything you do is going to cut the value.
Some collectors insist on cleaning their coins. One such collector had thousands of silver dollars. Every coin had been scrubbed with a harsh abrasive, every coin he bought got the same treatment, despite warnings from friends and dealers he did business with.
The result, after he was done cleaning the silver coins, the only value left was the silver content, less than an ounce in each coin.
Another collector put his coins through a rock tumbler, hardly one of the proper coin cleaning materials. The metal cleaners you see offered for sale on TV and elsewhere all are acid-based cleaners.
They remove some of the surface metal in the process of cleaning a coin. Avoid such coin cleaning products at all costs. Even a modern clad coin cleaned with one of these products will lose value.
A weak soap not detergent solution in distilled water will remove dirt and grease from an encrusted coin without damaging it, even if the coin is one of those grimy specimens found at the beach. City tap water has chlorine in it, which will discolor the coin.
Use distilled water, and rinse with distilled water. Acetone is another commonly used solvent, but there is a fire hazard that you should be aware of when using it as a coin cleaning material. Fingernail polish remover contains acetone, but it has other chemicals that may cause damage to upper grade coins.While cleaning coins is not recommended, if you feel you must clean your coins then follow the steps described below to minimize the risk of damaging heartoftexashop.com use metal polish or acid dip to clean your coins!
Why You Shouldn’t Clean Coins With Toothpaste – It Certainly Won’t Whiten Abraham Lincoln’s Teeth. You’ve probably seen a few websites that suggest your coin’s pearls need to be a little whiter.
Cleaning and Preservation of Coins - A Complete Guide, page 10 MECHANICAL CLEANING OF COINS: Effective Techniques and Methods (CONTINUED from Previous Page). Reasons NOT To Clean Coins. Say that a coin is in excellent condition, it has full LIBERTY, all fine lines and details are clear, but there is a little tarnish or black junk that shows on the details of the coin.
CLEAN PENNIES WITH VINEGAR. You will need * A few old (not shiny) pennies * 1/4 cup white vinegar * 1 teaspoon salt * Non-metal bowl * Paper towels.
Does this cleaning chemistry work on other coins? 3. Do other amounts of salt make a difference in the chemistry of the experiment?
Science Bob. More from my site. Recently a reader wrote about receiving “Details: Cleaned” grades from NGC, hoping to get more information about what constitutes a cleaned coin so that she can understand why seemingly unaltered coins are returned without grades.