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2018 penny tone
acadien
Posts: 635 ✭✭✭
Nothing special I guest. Just want to show the coins 
3
acadien
Posts: 635 ✭✭✭
acadien
Posts: 635 ✭✭✭
acadien
Posts: 635 ✭✭✭
acadien
Posts: 635 ✭✭✭
Nothing special I guest. Just want to show the coins
Comments
Interesting that they toned so fast. Maybe heat was a factor. Or maybe a liquid. Not sure.
They look better than most zincs look after a few years.
Copper and green = oxidation
The obverse around the rim has a different color, too. Maybe it was an album coin at one time and got pulled due to the reverse. Just a WAG.
Nice toning! ... Real nice pics also.
Copper is a highly reactive metal and when it comes in contact with various substances, will turn all sorts of colors . My guess.
Well... at least it is not a parking lot cent....
Cheers, RickO
Absolutely,
JBK and Hemispherical,
Heat, liquid, oxygen and nitrogen are all related factor for this nice toning on the above 2018 penny.
Rust is a type of corrosion specific to iron and ferrous metals, basically iron oxide along with hydroxides that form that familiar orange flaky coating that can eventually consume the entire piece of metal.
Copper also corrodes naturally ( a slower process than iron) in the presence of various other elements.
Oxygen forms copper oxides that are either red or black, often the oxidized copper will be appear brown as in an old penny.
In the presence of chlorides and sulfides with moisture, blue, and green combinations of corrosion are typical with copper.
"Rust" is a special term applied to the oxidation of iron only. Only iron "rusts", but other metals oxidize.
Oxidation is a chemical reaction between metals and oxygen. Oxygen is actually very damaging to metals.
Some metals oxidize throughout the total volume of metal. Rust is like that - let it rust long enough and it will dissolve away. Other metals don't do this - some, like aluminum, oxidize only through a very thin layer. Then the oxidized layer actually prevents the oxygen from reaching the aluminum under the oxidization, preventing further deterioration. Copper is like that ...
I for one, do LOVE the Toned coins!
"Jesus died for you and for me, Thank you,Jesus"!!!
--- If it should happen I die and leave this world and you want to remember me. Please only remember my opening Sig Line.Ultimately, what does this tell you?
The storage of the coins is not optimal.
The following is POST BY Anastasia, in regard the handling and Storage Methods for Coins.
With all of the corrosive elements present within the environment we live in, it is certainly wise to adopt the best coin and storage handling practices to reduce any further degrading or deterioration from simple human contact. All coins should be properly handled by grasping them by their third side – the edge. Wearing cotton or polyethylene gloves is also very important, because they inhibit the transfer of the corrosive oils and acids found in our skin and hands. Any coin with mirrored surfaces, such as Proof coins, are very susceptible to fingerprint damage, which will certainly disfigure the coin and obviously reduce its intrinsic value to a collector.
When storing coins individually, one of the best methods are in the coin holders referred to as ‘flips’. Coin flips are the perfect method to store and protect your coins, while still permitting each coin in your collection to be quickly and easily identified. There are vinyl flips, non-plasticized flips, and saflips, and the safest types are made of an archival-safe material commonly known as Mylar. These are produced in a wide variety of sizes for many coin dimensions, and have a convenient double-pocket design to hold both the coin as well as any descriptive notations. It is also recommended that certain types of these flips and other coin holders made with polyvinyl chloride (PVC) be avoided because of its long-term corrosive properties.
Coin storage is critical to maintaining your coin collection. If coins are not stored correctly, they could be damaged over a period of time because of scratches, weight, moisture, oil, sunlight or even temperature extremes. There is an incredible variety of coin storage solutions on the market today, including coin folders, coin holders, coin cases, coin boxes, coin display cases, coin slabs, and snap-lock cases. You can also choose between 2 x 2 coin holders, ring-type, coin pages and coin binders. Whatever coin holder you think is appropriate, you must be careful to make your selection based on the correct coin size. Not all coin holders are sized in the same way, and it is important to make sure your coins fit the holders properly, especially if you’re buying air-tites or plastic coin holders. It is also wise to remember that wooden coin cabinets, specifically those made of oak, are not recommended as a means for storing either coins or medals. Wood, as well as paper, can give off acidic or other chemical vapors that will cause corrosion. As an alternative, try to use powder-coated metal storage cabinets or containers made of either polyethylene or polystyrene.
It is also advisable to refrain from polishing rare coins, mostly because the natural patina caused by the accumulation of oils and oxidation over the coin’s lifespan often plays a significant role in how it is valued by collectors. Just as importantly, frequent polishing can decrease the keenness or clarity of the coin’s relief, as well as the legibility of its inscriptions. Using any type of commercial-grade polishes and dips should also be avoided to lessen the chances of residues being left behind in the crevices of a coin. These residues can have a damaging effect on the metal if it is not thoroughly removed. An artist’s brush (red sable #1 or #2) and distilled water is the best procedure to gently dislodge and remove these deposits. Be sure to allow the metal to dry completely before placing them back into their storage compartments.
One final measure of precaution to really ensure your coin collection is kept from the environment’s corrosive tendencies is to take photographs of both sides of each coin. It can significantly reduce the effects of unnecessary handling when you can share pictures instead of fingerprints, in addition to digitally documenting the coins in your collection for insurance verification.
You need to be very careful when looking at data from the internet and applying it to numismatics.
ASTM D130 measures the corrosiveness of petroleum products on copper as it's heated
Here is a summary of the test
https://ayalytical.com/methods/astm-d130/
Unless you store your coins in hot motor oil, I'm not sure if the toning colors on your cent could be correlated to the pics you showed. Maybe a coin in some types of storage environments will behave this way, but you can't make those conclusions based on a color standard used for this test method.
Got you, god advise.
Ironically, I have a 2018 with quasi bulls eye toning that showed up in change. It caught my eye for the toning, and then for the date.
send me a picture