Cleaning silver coins

December 21, 2015
Cleaning silver coins

Silver coins unlike copper and copper-nickel preserved quite well even in harsh environments. Yet silver coins can be coated with oxides as silver and other members of the metal coins.

Cleaning silver coins citric acid

Since silver is very slowly dissolved in citric acid, and oxides and other coating on the coin dissolve much faster then immersion in acid, hardly affect the body of the coin, and the oxides are dissolved.

cleaning technology is that the coin was immersed in a grenade and left for a few minutes. After 10 minutes it is necessary to get a coin and a toothbrush to remove the softened dirt and oxides.

The solution is prepared from dry citric acid (most that eat ordinary, from the grocery store). The concentration of acid for about two tea spoon in a glass of warm water (to clean a coin to cook all reasonable 10 - 20 grams of solution).

Silver penny to 25 cleaningSilver penny to 25 cleaningSilver 25 pennies after cleaning with citric acidSilver 25 pennies after cleaning with citric acid

These were 25 pennies is cleaned for 10 minutes in a solution of citric acid. The photograph clearly shows that citric acid does not damage the metal coins, but the patina of acid dissolves all the silver coins after pineapples will shine like new. To give the coin the haze of time after cleaning will have to artificially patinated.

Two coins: one to clean, after anotherThe photo shows two coins were originally both grimy and album are putting no cleaning was not pleasant. As a result, cleaning with citric acid 25 Penny did not get any visible damage and began to look much better. In this case, 25 pennies were initially in good condition and cleaned took only ten minutes. For coins covered with green cleaning oxides may take several hours.

Cleaning silver coins ammonia

Clean smelling salts of silver coins is significantly faster cleaning coins in citric acid. For cleaning use of ammonia solution (10% ammonia) from any pharmacy. Conveniently it is poured into a small container (5-10 ml.), The main thing that the coin was completely immersed in the solution. Coin flip is in a solution that both sides were cleaned at regular intervals.

Silver penny to 50 cleaningSilver penny to 50 cleaningSilver 50 penny 1916 after cleaning smelling saltsSilver 50 penny 1916 after cleaning smelling salts

These 50 pennies were cleaned off for 1-2 minutes in a solution of ammonia. The disadvantage of this cleaning can be except that peculiar smell of ammonia.

Silver 20 cents in 1870 to cleanSilver 20 cents in 1870 after 10 minutes in liquid ammonia20 cents, 1870 in the process of cleaning - 20 minutes in ammoniaAfter 2 hours of cleaning in ammoniaAfter 3 hours of ammoniaSilver 20 cents in 1870 after cleaning in liquid ammoniaReverse silver 20 cents in 1870 to cleanReverse silver 20 cents in 1870 after 10 minutes in liquid ammoniaAfter 20 minutes in ammoniaReversing after 2 hours of cleaning in ammoniaReversing after 3 hours ammoniaSilver 20 cents in 1870 after cleaning in liquid ammonia

This coin can be attributed to severe cases, when the result of the cleaning can not be predicted. Under the crust of oxides, which have been removed by using ammonia was the coin in quite collectible safety. On cleaning of the coin it took a lot of time - about 12 hours.

Two coins: 50 penny - after cleaning the smelling salts, 25 - penny after cleaning with citric acidThe picture is not much difference between the coin purified citric acid, and smelling salts. Hence the conclusion: everyone is free to choose what to clean silver coins, the result will not change.

Cleaning silver coins Trilon B

Trilon B means a strong and specially designed for cleaning metal surfaces. An aqueous solution of Trilon B dissolves almost all metal salts, but as Trilon not acid or alkaline it did not damage the metal. The peculiarity of cleaning silver coins in Trilon is that coins are obtained with a patina (they do not shine after the citric acid and ammonia). This effect can sometimes be useful.

15 cents in 1923 to clean15 cents after 4 hours in a solution of Trilon BSilver 15 cents in 1923 after cleaning Trilon

These were 15 cents are also rather complicated case. At first glance, it is impossible to say will come out under the normal coin oxides or "kakalik". Shoe Trilon slightly faster than cleaning with citric acid, but slower than smelling salts. Total for the purification of this coin took hold it in a solution of about a day.

Cleaning silver coins hydrochloric acid (HCL)

Hydrochloric acid is not bad enough cleans oxides from the surface of the silver coins, but there she and side effects - the coin's surface is covered by a very dense black patina (patina). Therefore, this method can be used not only for cleaning, but also for patination coins. So how to buy hydrochloric acid in pure form in stores rather than just the cleaning of coins, you can use a detergent based on hydrochloric acid - "Dressing Duckling" and diluted in water 1:10. The resulting dark layer on the coin is strong enough and can be erased only abrasive tools (eraser, GOI paste, etc.) is simply rubbed on the felt does not lead to any result.

Silver 15 cents in 1881 to clean, you can barely see what kind of coin15 kopecks half cleanedSilver 15 cents in 1881, after a day in a solution of toilet duckCoin after cleaning and giving eraser contrast

These 15 cents 1881 years have been cleaned off using hydrochloric acid. Before cleaning completely impossible to predict the outcome, and at first glance it seemed that after the removal of oxides of the coin there is nothing left. After cleaning the coin was uniformly black and to give relief it was worn eraser to protruding parts on the pattern partially erase patina.