How Long To Clean A 1920 German Coin In Vinegar
Restoring zinc coins
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Posted: 29-Oct-2011, 08:09 pm
This suggestion is Just applicable to zinc coins.
Have you lot ever encountered a basal zinc coin? Plainly so corroded that you cannot read the inscription? Before you throw it away, try soaking the zinc coin in vinegar for an hr and a half or ii hours, earlier washing in common cold h2o and rubbing gently with your fingers under the water flow and then rubbing briskly on a piece of cloth.
You may be surprised every bit the results!
I hope to produce a Numisdoc article on restoring coins in the future, first though I need to obtain some more badly corroded and/or dingy examples to work with!
Matt
pnightingale
Joined: 27-Jul-2011
Posts: 5383
Posted: thirty-Oct-2011, 05:31 am
Posted: 30-Oct-2011, 05:31 am
Quote: Matt Probert This suggestion is Only applicative to zinc coins.Have you ever encountered a basal zinc coin? Plainly so corroded that you cannot read the inscription? Earlier you throw it away, try soaking the zinc coin in vinegar for an hour and a half or two hours, earlier washing in cold water and rubbing gently with your fingers under the h2o menstruation and then rubbing briskly on a piece of fabric.
Y'all may be surprised every bit the results!
I hope to produce a Numisdoc article on restoring coins in the future, first though I need to obtain some more badly corroded and/or dirty examples to work with!
Matt
Your timing is uncanny, I picked up about a dozen one & 10 Reichpfennigs from a rummage box for twenty cents each and more than half of them have deteriorated to the point where the mint mark can't be read. Strangely the main designs and fields are well preserved. As you probably know mintmarks are the fundamental to 3rd Reich issues so being only able to run into them under 100x magnification is somewhat unsatisfying.
I'll try one with some left over white vinegar and let you know how it works out.
Not illegitimis carborundum est. Excellent advice for all coins.
Make Numismatics Great Again!
lidianb
Joined: 29-April-2011
Posts: 650
Posted: 31-Oct-2011, 06:27 pm
Posted: 31-Oct-2011, 06:27 pm
Hello,
this is quite an interesting topic. I have some 1947 Zinc Albanian Leke, which have accumulated some clay and some white residues.
What kind of vinegar you communication to employ? I mean white, cherry-red, which fruit from or artificial, not by brand. With which kind did you try and had good results?
Thanks and regards
Posted: 31-Oct-2011, 07:54 pm
Quote: lidianbHello,this is quite an interesting topic. I have some 1947 Zinc Albanian Leke, which accept accumulated some clay and some white residues.
What kind of vinegar you lot communication to employ? I mean white, cherry, which fruit from or artificial, not by brand. With which kind did you attempt and had proficient results?
Thanks and regards
The white residues are zinc oxide. These form when zinc is exposed to mositure in the presence of heat (don't boil zinc coins!!!). Zinc oxide is dissolved past vinegar, among other acids.
White vinegar, Or dilute sulphuric acrid, but that tin exist dangerous and is not advisable unless you know what yous're doing!
Y'all don't want to utilize exotic 'flavoured' vinegars, just plain white vinegar you can get cheaply from a supermarket .
Matt
KennyG
Joined: 25-Apr-2010
Posts: 4635
Posted: 1-Nov-2011, 02:12 am
Posted: i-Nov-2011, 02:12 am
Matt, actually nice topic.
Do yous accept whatever advice for Tin can coins? I have a few WWII sen from Japan and I'd like to make them look squeamish.
Kenny
- Verifying your Asian and British-territorial coins everyday with the best quality photos and the best data.
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Posted: one-November-2011, 10:04 am
Quote: SmartOneKgMatt, actually nice topic.Do y'all have whatever advice for Tin can coins? I have a few WWII sen from Japan and I'd like to make them expect dainty.
If you have tin can coins which are in and so bad a condition that you can not read the insription (and are therefore completely worthless and basal) then you have zip to lose past experimenting. I accept no experience with tin, merely should I e'er encouter whatever I'll allow you know how I get on.
In the meantime, it is worth remembering that household oil, the stuff used for oiling hinges, dissolves atomic number 26 oxide (rust). All the same, when iron oxidises information technology really does oxidise, and the rust often is the coin. removing it can remove the very fabric of the coin.
Matt
pnightingale
Joined: 27-Jul-2011
Posts: 5383
Posted: 2-Nov-2011, 11:48 pm
Posted: 2-Nov-2011, eleven:48 pm
Is verdigris, that ugly green curse of copper and statuary coins, like enough to rust to respond to light oil?
Non illegitimis carborundum est. Excellent communication for all coins.
Make Numismatics Smashing Once again!
Posted: three-Nov-2011, 08:07 am
Quote: pnightingaleIs verdigris, that ugly light-green expletive of copper and bronze coins
Yes it is. It forms on the surface of copper and contumely when they are exposed to damp in contact with acid.
Matt
redsmithstudios
Joined: twenty-December-2010
Posts: 2766
Posted: 25-Nov-2011, 12:36 am
Posted: 25-Nov-2011, 12:36 am
"In the meantime, it is worth remembering that household oil, the stuff used for oiling hinges, dissolves fe oxide (rust). However, when atomic number 26 oxidises it really does oxidise, and the rust often is the coin. removing it can remove the very cloth of the coin."
I simply read this, but a while dorsum I posted a question about a Indian caput penny I had plant, it has rust corroded to information technology merely I wanted to keep the dark-green, although what you mention here seems best, what exercise you lot remember?
Taking a break from swapping for a while, but still interested in pre 1799 Spanish coins, I will make time for that!
Looking for pre 1783 coins
0gramz
Joined: 20-Nov-2010
Posts: 575
Posted: 25-November-2011, 03:05 am
Posted: 25-Nov-2011, 03:05 am
heres something i tried on a few zinc coins that were junk and information technology restored them well light a candle and dip your finger on the liquid wax then lightly rub it over them it creates a coding amazing how it works simply i wouldnt do it to any that were worth anything but its just a cool experiment i did on a few cheapos i got in big lot bags that werent in to skillful of status becouse i noticed that aforementioned problem with the white oxidation corroding the coins and the wax restored them well plenty to make them boilerplate again they never oxidizated later that it even kind of brought out the item really nicely but i wouldnt recommend it on any simply worthless ones
0gramz
Joined: 20-November-2010
Posts: 575
Posted: 25-Nov-2011, 03:23 am
Posted: 25-Nov-2011, 03:23 am
possibly not such a good idea but heres earlier and after my experiment
before
after
works better with darker wax
0gramz
Joined: 20-November-2010
Posts: 575
Posted: 25-November-2011, 03:27 am
Posted: 25-Nov-2011, 03:27 am
what it really does is stops it from oxidizing anymore then they already have
0gramz
Joined: 20-Nov-2010
Posts: 575
Posted: 25-November-2011, 03:50 am
Posted: 25-Nov-2011, 03:50 am
maybe i will endeavor soakin one in vininger then rubbing down with wax maybe coin volition last for ever i estimate if i put a zinc coin in a cup of melted wax permit information technology harden then bury information technology someone will notice it in far futurity and be amazed how well it was preserved what a great archealogical find for them
Posted: 6-Dec-2012, 02:06 am
Taken from:
http://metaldetectingworld.com/cleaning_coin_p19_zinc_tin.shtml
Annotation: All chemical cleaning methods are relatively safe. Still, their use and application are entirely at the reader's chance. We assume no responsibility for impairment to belongings or personal health.
CLEANING ZINC COINS
Zinc was used for coinage only in emergencies and but for coins destined to have a brusk menstruation of apportionment.
For example, zinc money occurs principally in many emergency coinages of German cities after the First World War and also in the modest change of the Third Reich from 1940.
It must be assumed that the raw cloth bachelor was not always satisfactory. Zinc contains traces of pb, bismuth and iron. These impurities cause zinc coins to vary in behavior with chemicals. That is why removal of the unsightly zinc oxides by various chemic methods tin can cause unexpected discoloration on coins. This discoloration oftentimes occurs in different forms, fifty-fifty with coins of the aforementioned blazon.
The following methods can exist used for cleaning zinc coins:
1) Mechanical cleaning of dirt from zinc coins can be done more vigorously than for silverish. A hard brush is best, but a glass brush and an ink eraser can be used advantageously as well.
ii) Moisture cleaning: dirt on zinc coins is near easily removed by softening in warm soapy water. This is done for every bit long as necessary. The coins then can exist brushed with a stiff brush or a glass castor. It is also possible to rub the coins with the common salt, sprinkled on from a salt shaker, with the fingers or a cloth.
3) Immersion into a Hydrogen Peroxide bath, described on page eleven, is applied briefly to remove the dirt.
iv) Chemical cleaning: zinc coins can be cleaned very simply by rubbing them with a moist cloth that has been passed over Vitrolin Copper Soap. If the blanket is heavy, the zinc coins tin can exist steeped in Copper Lather Paste for five to ten minutes. Thorough soaking for a quarter to one-half an hour must follow.
5) Sulfuric Acid (H2SO4) Method: the all-time and at the same time the simplest method of removing grayish-white zinc oxidation is placing the coins in approximately 5% Sulfuric acrid (diluted 1:20) and leaving them at that place for x to 20 minutes.
CAUTION: DILUTION OF SULFURIC ACID MUST E'er Be DONE BY POURING ACID INTO H2o IN A FINE STREAM, NEVER past pouring water into full-bodied sulfuric acid!
The coins are turned over several times with two wooden sticks. Neutralization is achieved by immersion in 5% Sodium Hydroxide (caution: caustic soda) and rinsed thoroughly. They are then brushed.
Boiling in five% Sulfuric acid or brief immersion of heated coins in concentrated sulfuric acid is non recommended equally the coins at the conclusion announced far more spotted.
Zinc coins must be protected unconditionally from the consequence of the atmosphere and its constituents, or they will darken again in a brusque time (a few weeks). This is best done by lacquering with Japanese lacquer. An oil movie tin can be provided past kerosene or Ballistol.
Posted: 6-Dec-2012, 03:42 am
Does it work with zinc plated coins too, or exercise yous run the run a risk of removing the plating?
Posted: xi-Dec-2012, 05:04 am
Posted: xi-Dec-2012, 05:04 am
Quote: Matt Probert This suggestion is But applicative to zinc coins.Take you ever encountered a basal zinc money? Plain so corroded that you cannot read the inscription? Earlier you throw it abroad, attempt soaking the zinc money in vinegar for an hour and a half or ii hours, before washing in common cold h2o and rubbing gently with your fingers under the water flow and and so rubbing briskly on a piece of textile.
Y'all may exist surprised equally the results!
I hope to produce a Numisdoc article on restoring coins in the future, first though I need to obtain some more desperately corroded and/or muddy examples to work with!
Matt
Bully information
Posted: 24-Feb-2013, 06:31 pm
Honey zincs! Happy to leave them just the mode they are and preserve them, of course, from further deterioration.
chrismck
Joined: 27-Sep-2012
Posts: 325
Posted: 27-Feb-2013, 05:31 am
Posted: 27-February-2013, 05:31 am
Quote: SmartOneKgMatt, really overnice topic.Do you have any advice for Tin coins? I have a few WWII sen from Nihon and I'd like to brand them look nice.
My only advice for tin/aluminum is non to use hydrogen peroxide. I've never had whatever success cleaning these coins, but peroxide destroys them.
pileborg
Joined: 8-Aug-2012
Posts: 179
Posted: 27-Feb-2013, 05:24 pm
Posted: 27-Feb-2013, 05:24 pm
This chemistry, so I was thinking there should exist a mutual formula for this. Later on googling it, I found at that place is.
Basically, metal oxides are alkali metal, so:
Oxide + acid --> salt + water
So dissolving oxide from zinc, tin can, copper or iron, should work with any acid, be it vinegar (which contains acetic acid), sulphuric acid, or coca cola (which contains among other things phosphoric acid). Stronger acrid = stronger reaction naturally.
Coca Cola Classic: pH 2.v
Vinegar: pH 2.4 - 3.5 depending on the concentration of acrid
Sulphuric acid, around 10% concentration: pH 1 - 2
Oil is slightly acid, it's called "Fatty acids" correct, I don't know if this explains why also oil works since oil is insoluble in water. Poor oils are more acrid than better quality oils. Stearin, which candles these days normally are made of, is a kind of fatty acid.
Edgarfive
Joined: 22-Feb-2013
Posts: 97
Posted: 3-Mar-2013, 07:34 pm
Posted: 3-Mar-2013, 07:34 pm
I never accept cleaned a zinc coin but the people at my money club swear past (at leat for zinc pennies) oven cleaner spray.
Give me a dozen men who are not afraid to die, and I'll accomplish what all the Generals & Admirals with all their Armies & Battleships cannot. -Otto Skorzeny the best special forces commander ever.
Kwasura
Joined: 22-Apr-2013
Posts: 7
Posted: 22-Jun-2013, 01:49 am
Posted: 22-Jun-2013, 01:49 am
I tried olive oil and table vinegar on my 1943 10 Dinara. Oil did zippo. Vinegar managed to lighten the money from 60% Grey to 30% Greyness. Just because my coin is in the UNC condition I actually want to render it to the Mint condition, means shiny, and to proceed it this way.
Now what should I practice? I oasis't started to rub the money with anything yet, before I will know exactly how it will touch on the coin. Help please.
Posted: 3-Aug-2013, 03:51 pm
I bought this coin for couple of bucks and merely received it. Coin looks very unusual, since mostly these types of coins are very nighttime grey, usually with white spots. Merely this one is very lite, looks like aluminum. I know that while new these coins were similar this, but since I bought it this cheaply I think that it was cleaned or dipped in some kind of cloth. What is your opinion ? With which material you could clean information technology to this degree ?
Posted: 16-Oct-2017, 08:29 am
And then I judge I will take to re-read all the posts and come across if I missed something, I intendance less about "restoring" my zinc coins, and I did read many, many, many words concerning that aspect. I do though, very much desire to "preserve" them. The just input on that I caught was from someone playing in wax... I mean, if it works, cool, but information technology seemed to be one persons experiment, which seemed to work, but.... Whats the best mode to preserve zinc coins? Secondly, subsequently someone suggests: taking them to the moon in a capsule is the best manner.
What is the most economic way for an boilerplate collector to PRESERVE his zinc coins?
Thanks Much for all input :)
5element
Joined: 4-Aug-2015
Posts: lxxx
Posted: 16-Oct-2017, 06:20 pm
Posted: 16-Oct-2017, 06:twenty pm
A wooden box would be perfect.
derf
Joined: xi-Mar-2012
Posts: 1750
Posted: 16-Oct-2017, 07:33 pm
Posted: xvi-Oct-2017, 07:33 pm
Quote: "michsignman"What is the most economical way for an average collector to PRESERVE his zinc coins?
I soak my zinc coins in WD40 over nighttime. Side by side day, apply strong, brusk (horse) hair brush to make clean of anything that is loose. Then pat them dry out with paper towel and put them in self sealing 2x2s, using and iron tow heat the edges to ensure the glue seals air tight. The WD40 stops any farther corrosion ...
? Format Format Format ? ?
Do not contend with ignorant people .. !! They will elevate you lot down to their level, then pulverize you lot with experience ...
Posted: 17-Oct-2017, 07:18 am
There ya go!!! thats my kinda answer... 500 yrs from now I'm less concerned... but between vinegar, mineral oil, vasoline, soy candle wax, and "WD-xl" , I felt one of these should work. I was just concerned of a chemical reaction I hadn't heard of betwixt zinc and ammonia ore something would either melt my coin into a slurp, or knock me out from the fumes... hehe... Thanks
I know from experience oils well-nigh metals either lubricate or totally prevent most corrosion, oxidizing, rust without whatever deterioration I know of. I simply never played with zinc as a kid I approximate... heh
Posted: 26-Nov-2017, 01:19 am
Howdy,
Cheap zinc coins tin be cleaned just leaving them all night long or some hours in vinegar depending on how muddied they are. Dry out them and so with a piece of cotton fiber fabric and plenty baking soda rub them. If the coin is likewise dirty just repeat the process merely using less time. Rinse them with water, dry them and protect them with museum wax. They volition look pretty skillful and all inscriptions and images will be readable.
Kwasura
Joined: 22-Apr-2013
Posts: 7
Posted: 23-Jan-2018, ten:07 pm
Posted: 23-Jan-2018, 10:07 pm
Yes, but is there a fashion to make them shiny? This is how they were when just minted.
Posted: 17-May-2020, 07:01 pm
Liar! Don't trust him! Vinegar doesn't dissolve moisture or zinc oxide! I found out the hard manner. I found my kickoff Reichspfennig yesterday. And you can gauge what happened. The vinegar dissolves the zink. Small bubbles are coming off the money. (Hydrogen) Idk what called in English (entzinken) means removing zink from something. If you put this for like ane-2h in vinegar, information technology will dissolve completely. Don't listen to this dumbass.
Posted: 17-May-2020, 10:xix pm
Quote: "Alexander Georg"Liar! Don't trust him! Vinegar doesn't dissolve wet or zinc oxide! I found out the hard fashion. I institute my first Reichspfennig yesterday. And you lot tin approximate what happened. The vinegar dissolves the zink. Small bubbling are coming off the coin. (Hydrogen) Idk what called in English (entzinken) means removing zink from something. If you put this for like 1-2h in vinegar, it will dissolve completely. Don't listen to this dumbass.
You use some large words, for someone who is here for the outset twenty-four hour period!
...you can run, but you tin't hide...
Posted: 17-May-2020, 10:41 pm
Quote: "yvon"=1emYou use some big words, for someone who is here for the first day!
🤣
Dutchgalego
Joined: 25-Sep-2011
Posts: 989
Posted: eighteen-May-2020, 02:18 pm
Posted: 18-May-2020, 02:18 pm
Quote: "Kwasura"I tried olive oil and table vinegar on my 1943 ten Dinara. Oil did nothing. Vinegar managed to lighten the coin from 60% Gray to 30% Grey. But because my money is in the UNC condition I really want to return information technology to the Mint condition, means shiny, and to keep information technology this fashion.
Now what should I do? I haven't started to rub the coin with annihilation yet, before I will know exactly how information technology will affect the coin. Help please.
UNC coins shouldn't be cleaned. Althought I wouldn't do it. After cleaning a coin, the original mint state and/or build up patination volition be lost forever. An expert will always know when a money has been cleaned.
Always fix to swap within the Netherlands!
Kwasura
Joined: 22-Apr-2013
Posts: 7
Posted: 18-May-2020, 06:52 pm
Posted: 18-May-2020, 06:52 pm
Hello fellow collectors. Afterwards many years of inquiry and experiments I finally came to conclusion. And it is not as good as I idea it will exist.
First I want to terminate a word about cleaning or non cleaning your coins. Of course it is up to you lot, but delight, never say never. Professionals are cleaning the coins all the fourth dimension. After all this is how yous run into them in the museums. It is called "conservation" or "restoration", and it is very of import to remove something that can destroy metal and to prepare the coin for the many years to come up. Also patina is not something that tin can be "lost forever". Patina is natural oxidation of the metal, formed over the years. Simply clean your penny and put it dorsum to your pocket, come across what will happen in a few months time. I am non worry about it. Of grade, if you have a perfect coin with perfect patina - keep it. But how many of us this lucky? I know, I am totally running out of luck when it comes to zinc coins.
And then, this is my conclusion, after trying everything I could retrieve of...
Long story brusque... if information technology is not perfect - don't carp.
You won't be able to set up anything. Zinc is a merciless metal. Nothing is worst than zinc. Say, you lot are about to buy a very good looking zinc money in apparently UNC status, and the only think that is on your style - is this little "spot" or "stain". Just you are sure you can fix it - how hard tin it be? Well, the answer is - forget it! Y'all won't be able to do anything. It is never "innocent little spot", in fact it nothing but corrosion. It tin expect like spot, stain, fingerprint, stripes or something else, but information technology hither to stay forever. Corrosion ways that some of the metal is destroyed, and you will have to remove even more metal to get rid of it. Corroded coins tin not be fixed, and for certain can not be considered UNC. Doesn't matter how big is the impairment, damage is washed.
Shame really. Many of the zinc coins are highly collectable. I personally struggling to get 1920 Yugoslavia. Even tough I am trying to avoid zinc coins as much as I tin can, just we like what we similar, and collect what we collect.
So, when it comes to zinc coins - BU is UNC and UNC is XF. And you should always physically encounter it. Most of the time film will be deceiving. Which makes purchase online nearly impossible. And in result will brand any decent zinc money very, very expensive.
Welcome to the world of zinc coins... Skillful luck, and happy collecting.
pnightingale
Joined: 27-Jul-2011
Posts: 5383
Posted: eighteen-May-2020, 07:50 pm
Posted: eighteen-May-2020, 07:50 pm
After many years of collecting 3rd Reich issues, many of which are zinc, I've arrived at the same decision. If yous can't learn to live with zinc related issues - go discover something else to collect! You but can't fix information technology and the attempted cure is ever worse than the original trouble. Apart from taking every possible mensurate to stop corrosion from getting worse and keeping problem costless coins trouble costless, at that place's not much yous tin usefully do.
I've adult a real appreciation for the value of a pristine zinc money and accept been actively seeking them out. Their rarity means it's all merely incommunicable to build a consummate gear up of every date / mint mark just who doesn't honey a challenge?
Non illegitimis carborundum est. Splendid communication for all coins.
Make Numismatics Great Over again!
Idolenz
Joined: xiii-Jul-2013
Posts: 4365
Posted: 18-May-2020, 08:34 pm
Posted: 18-May-2020, 08:34 pm
Most of the problems of zinc coins are present from the moment the planks where fabricated. Zinc with certain impurities corrodes from inside a well equally outside, you just have to find a error free specimen and effort to stop deterioration from exterior or be complacent with the country information technology is when you get it.
pnightingale
Joined: 27-Jul-2011
Posts: 5383
Posted: xviii-May-2020, 11:18 pm
Posted: 18-May-2020, 11:18 pm
Quote: "Idolenz"Most of the problems of zinc coins are present from the moment the planks where made. Zinc with certain impurities corrodes from within a well every bit outside, you simply have to find a error gratis specimen and effort to terminate deterioration from outside or exist conceited with the country information technology is when you become it.
Yes sir, zinc is an atrocious option for making coins. I have an well-nigh complete 3rd Reich drove by year and mint and out of all those hundreds of coins I take only two or 3 zincs which I'm fully content with. They are nighttime, without vesture and accept a pleasant sheen to them. I reckon the only difference from the day they left the mint is the inevitable darkening of the surfaces. I'm very proud of them, far more than then than any of the big flashy silver 5 Reichsmarks I own.
If anyone has such coins to merchandise I'll offer virtually advantageous terms for the right coin(due south).
Not illegitimis carborundum est. Excellent advice for all coins.
Brand Numismatics Great Again!
Mr. Midnight
Joined: x-Mar-2017
Posts: 2327
Posted: xix-May-2020, 12:l am
Posted: 19-May-2020, 12:l am
Quote: "Idolenz"Most of the issues of zinc coins are nowadays from the moment the planks where made. Zinc with sure impurities corrodes from inside a well equally exterior, you just have to find a error complimentary specimen and try to finish deterioration from outside or be conceited with the state it is when you get it.
zinc rot,
the bane of die bandage collectors the world over for decades
Jamais fifty'or n'a perdu la plus petite occasion de se montrer stupide. -Balzac
Kwasura
Joined: 22-April-2013
Posts: 7
Posted: xiii-Jul-2020, 12:03 pm
Posted: 13-Jul-2020, 12:03 pm
Would like to offer to your attention this article on Slovak web site. I found it quite interesting.
Slovenský štát – mince 1939-1945 (SLST)
Posted: 21-Jul-2020, 12:27 pm
Just out of curiosity. Early on in the thread information technology was mentioned non to boil zinc coins. Tin you literally dissolve USA pennies and other zinc coins by boiling them?
K.Due east.T.
Joined: 25-Jul-2020
Posts: 26
Posted: 17-Aug-2020, 06:36 pm
Posted: 17-Aug-2020, 06:36 pm
I tried using vinigar to clean a inexpensive zinc coin I have (https://en.numista.com/catalogue/pieces21159.html). I let it soak in rice vinigar (it'due south what I had) for about an hr, then wiped information technology off with a paper towel and rinced it in water and dried again. Hither are the results:
Before
Later
Like someone else pointed out, the corosion isn't something on the coin, like clay, the corosion is the money. When you clean the corosion off, y'all remove part of the coin, as can conspicuously be seen from these pictures. I have 3 other zinc coins (2 other 10 aurar coins and one 25 aurar coin), and I don't think I'll be trying to make clean them.
Kwasura
Joined: 22-Apr-2013
Posts: 7
Posted: 17-Aug-2020, 07:18 pm
Posted: 17-Aug-2020, 07:18 pm
Quote: "blue-thou"Merely out of curiosity. Early on in the thread it was mentioned not to boil zinc coins. Can you literally dissolve USA pennies and other zinc coins past boiling them?
You will not dissolve them, just boiling will trigger the corrosion. I've tried to eddy zinc coin in water with baking soda. At first I was happy, soda removed an oxidation, and heating accelerated this process. But subsequently some time the money got covered in white dust, making the legend and other details almost invisible. It has something to practice with the heating. Apparently you should never hear zinc coins.
K.E.T.
Joined: 25-Jul-2020
Posts: 26
Posted: 17-Aug-2020, 10:35 pm
Edited: 17-Aug-2020, ten:37 pm
Posted: 17-Aug-2020, ten:35 pm
Edited: 17-Aug-2020, x:37 pm
Posted: 24-Aug-2020, ten:21 am
hi does anyone know if this will work on brass coins equally well? I've got a couple of contumely coins with green and white spots.
Kwasura
Joined: 22-Apr-2013
Posts: 7
Posted: 24-Aug-2020, 11:49 am
Posted: 24-Aug-2020, xi:49 am
Hello. Brass coins are totally different discipline. Please stick to the topic.
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