FORVM`s Classical Numismatics Discussion Board
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I have two questions about this coin:
First, I think that on this coin Julia Domna.
Secondly, this coin was not cleaned, has recently been found, so that the best way to clean and preserve, and not to damage the patina with him.
The maximum diameter of this coin is 18 millimeters, and weighs 2.9 grams, Mint in Siscia
Thanks Shandorr
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Looks like legend FLAV MAX - FAVSTA AVG, so not Julia Domna.
Mechanical cleaning under the microscope is probably the only way to bring out the details while preseving the patina.
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I was a few days on the internet, so I could not thank you for your help.
Thanks for your help
Shandorr
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I cleaned the coin, mixed techniques, chemicals and more mechanical. I hope I succeeded.
Thanks for the advice
Shandorr
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Shandorr,
Looks good. What chemicals did you use and how did you use them?
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Coin'd soaked cream "Melkfett mit Ringelblumen-Extrakt" (Dr Foster GmbH). Very greasy cream, half an hour after I'd washed in pure alcohol, and so would sediment on the coin much softened. Then I would remove it with a razor. This procedure would be repeated several times. then the coin would wash the alkali to neutralize the acid from alcohol. I use ash as a source of alkali. And finally smeared Turpentine oil.
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In a similar way, I cleaned this Celtic coin ring
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Shandorr, what is melkfett?
And what do you mean by 'acid from alcohol'?
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Well, it must be butterfat, but I'd have to go the the dictionary for the other ingredient. Pat L.
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The other ingredient is calendula, which I doubt is significant. Wikipedia says melkfett is 'bag balm' which is 8-hydroxyquinoline sulfate 0.3% in a petroleum jelly and lanolin base. In other words, soak coins in mild acid with grease! And acid comes from the balm rather than from alcohol.
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Yes you are absolutely right. The cream must be as oily (Vaseline is best) This cream is something like vaseline with marigold extract, but does not have to be just that. Alcohol has a mild acidity, and effectively remove fat with coins. But the sediment on a coin after the treatment is much easier to remove mechanically. The procedure is necessary to repeat several times. I mention the need to end the coin wash solution. I protect you it Turpentine oil.
Here's another example, but I ended up with a clean, Emperor Licinius
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'Melkfett' is a skin emollient on the basis of Vaseline used at milking to protect the teats of cows or goats.
Best regards
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'Melkfett' is a skin emollient on the basis of Vaseline used at milking to protect the teats of cows or goats.
Best regards
The active ingredient for cleaning coins is apparently 8-hydroxyquinoline sulfate which is a chelating agent and is also slightly acidic.
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Thanks to Jochen, I'll never forget what Melkfett is, whether or not I ever need any. It is useful to learn graphically. Pat L.
Ancient and Medieval Coin Identification Help => Topic started by: Shandorr on November 23, 2010, 03:28:48 pm