Author Topic: Bad coin  (Read 1222 times)

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Bad coin
« on: February 21, 2011, 10:53:27 PM »
Best way to clean a coin ???
Already tryed vinagar and ketchup

Online Figleaf

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Re: Bad coin
« Reply #1 on: February 21, 2011, 11:28:03 PM »
Vinegar is of course very acidic and ketchup contains acids also. While they will work on silver coins, they do so by eating away silver. You should in general not use acids on silver. Even if you have a metal detector and found some clumps that seem to contain silver, acid is your very last recourse.

Bronze and copper will turn pinkish after a treatment with acid and generally look awful.

An unidentified coin is a piece of metal. An identified coin is a piece of history.


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Re: Bad coin
« Reply #2 on: February 22, 2011, 01:04:16 AM »
Please post a picture of the coin.

Offline Coinsforever

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Re: Bad coin
« Reply #3 on: February 22, 2011, 02:37:14 AM »
Few of the tips learned and tried for cleaning coins.

A) For gentle cleaning  of contemporary coins  use warm water in running conditions and then drying coin completely is best way without damaging it.

B) However for ancient coins special cleaning methods are available.

C) Vinegar & Ketchup  are for use in Kitchen only , it is not at all  recommended by any of experts.

Cheers ;D
Every experience, good or bad, is a priceless collector's item.

Offline bruce61813

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Re: Bad coin
« Reply #4 on: April 26, 2011, 03:47:13 AM »
No one has asked what is the metallic composition of the coin. If it is copper  or a copper based alloy, keep it away from acids, the resulting color is ugly. Unless you like pink coins. Use a alkaline or base type cleaner: bi-carbonate of soda, washing soda [sodium carbonate] or the 2 mixed in equal parts.

Silver coins can be cleaned with mild acids - ie lemon juice. One method is to put the silver coin in a wrapping of aluminum foil with baking soda, and placed in a dilute lemon juice/water combination. This is a simple form of "electrolysis" without a power supply.