Cleaning Silver Coin With Just Water?

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Author	Replies: 7 / Views: 1,236
RobertP Valued Member Romania 68 Posts	Posted 07/28/2017 04:57 am I have a 1915 korona and there is a bit of black stuff on it. I gently rubbed with my fingers and it slowly disappears. If I try with water, it will damage the coin? * Moved by Staff to a more appropriate forum. * Report this Post to the Staff

Coopertron5000 Pillar of the Community United Kingdom 516 Posts	Posted 07/28/2017 05:46 am Have you got a photo? Water shouldn't harm it but if the black marks been there a while you may end up with patchy toning underneath. Report this Post to the Staff
RobertP Valued Member Romania 68 Posts	Posted 07/28/2017 06:07 am The thing is mostly on the edge of it. Report this Post to the Staff
Nazarene Valued Member United States 128 Posts	Posted 07/28/2017 10:10 am Maybe gently with some distilled water. You will almost certainly have uneven toning though. But personally, I'd rather have some uneven toning that black crud on a coin like that. Edited by Nazarene 07/28/2017 10:12 am Report this Post to the Staff
biokemist6 Bedrock of the Community United States 12437 Posts	Posted 07/28/2017 12:48 pm Rubbing the coin with your fingers will damage it, producing fine scratches called "hairlines". The black stuff is most likely toning/tarnish which will not be removed with water because it is chemically bonded to the coin. Report this Post to the Staff
RobertP Valued Member Romania 68 Posts	Posted 07/28/2017 3:46 pm Thank you guys for your answers :) Btw how you can tell if the fine scratches are from the use(back in those days) or "rubbing" it with fingers? Report this Post to the Staff
Debrajc Pillar of the Community United States 4211 Posts	Posted 07/28/2017 5:38 pm Robert~!! I bought a jewelry's loupe and studied all kind of coin surfaces to help me with "cleaning" marks. Report this Post to the Staff
Numismat Pillar of the Community United States 1666 Posts	Posted 07/28/2017 6:26 pm I'd dab a q-tip in pure acetone and gently wipe it off. Water is an issue because when it dries it will leave a film of mineral deposits on the surface of the coin. Especially if you have "hard water" where you are. Report this Post to the Staff
	Replies: 7 / Views: 1,236

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