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 Replies: 69 / Views: 4,929 |
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Pillar of the Community
United States
834 Posts |
quote:
Originally posted by Becky
I'm with everyone else Ralph. Throw her in the album just the way she is. She's nice and crusty!!
Becky, I am so glad to see you here now that I am a new member I have always enjoyed your post at my other forum. Bruce. |
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Pillar of the Community
United States
954 Posts |
Good to see you too Bruce!!
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Pillar of the Community
United States
751 Posts |
quote:
Originally posted by Ralph
I think I know what you are talking about, but would appreciate some examples
Acetone is a solvent (organic, right biokemist?) that will dissolve certain compounds sitting on the surface of the metal that have not chemically bonded with the metal. It is a good thing to use to wash dirt from a coin. But it won't do a thing when there has been a chemical reaction--toning, patina, "crust"--between the silver and the contaminant. For that, you need to strip the surface of the coin. And for most of us, that is a no-no. |
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Pillar of the Community
United States
1083 Posts |
Collecting a complete 19th Century Type Set is exactly what I have been doing. Guess I better get an album. All I lack now are the Bust, Trade and Liberty dollars, and the Draped bust half and large cents. All my coins are F to XF depending on what I can afford, but in the really expensive ones I have bought one or two VG-8s if they are fairly problem free.. With all you guys looking for problen free circulated type coins for your 7070 albums, I now understand what is making the market so hot for these coins. Guess I better get an album since I'm close to completing the set.
Colin
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Bedrock of the Community
United States
14454 Posts |
Bruce an example would be something like a fingerprint that has been there for years, it is etched into the metal (especially on silver) and acetone will not remove it, then you have something like a sticker residue, which the sticker has been taken off and the glue is still on the coin, that is "on" the coin and acetone can remove it from the surface. Thats what he meant when he said there is on the coin and in the coin. On the coin can been removed as long as it hasn't eaten into the surface with acetone
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Pillar of the Community
United States
1582 Posts |
Okay , I've taken the liberty of posting a Morgan that I felt had tape residue on it. I soaked it in acetone for a full day, rinsed it with distilled water, and it removed some of the gunk, but not all of it. Would you consider this an example of what you're talking about? Image:  1886 S.jpg73.14 KB Image: 86 S Rev.jpg81.13 KB |
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Bedrock of the Community
United States
12437 Posts |
quote:
Originally posted by texasmick
Acetone is a solvent (organic, right biokemist?) that will dissolve certain compounds sitting on the surface of the metal that have not chemically bonded with the metal. It is a good thing to use to wash dirt from a coin.
But it won't do a thing when there has been a chemical reaction--toning, patina, "crust"--between the silver and the contaminant. For that, you need to strip the surface of the coin. And for most of us, that is a no-no.
Yes, you are correct. Organic solvents will only remove dirt, finger grease, or green pvc gunk (not green corrosion on copper and nickel) and anything else of an organic nature, leaving metal undisturbed. An organic solvent can be anything from isopropanol(rubbing alcohol) to diethyl ether. Acetone works best because it will have a very low (almost non-existant) water content unlike isopropanol which is sold as a 70% solution with the balance being water. Acetone also has a low flash point, meaning it evaporates quickly at room temp. Ether has an even lower flash point but is very explosive and intoxicating so that renders it unsuitable. Acetone is the solvent of choice for coins due to wide availability, negligible water content, and reasonable safety. Disclaimer: Always use acetone in a well ventilated room and away from any heat source or flame. |
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Pillar of the Community
United States
834 Posts |
Hi All' Today I picked up a 1853 Seated Liberty quarter arrows at date rays around in grade very fine. A very nice no problem example of this type and it just looks great in it's hole. Bruce. |
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Valued Member
United States
411 Posts |
[quote] Originally posted by Ralphthe black stuff on it. Which brings up another point - what is it, and how do I get rid of it? Acetone? Toothpick?..........?  Ralph PLEASE DO NOT USE A TOOTHPICK. I'd leave it alone. It doesn't look too bad and that's a nice coin. Like somebody else said, dipping will ruin it. Cheers, |
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Pillar of the Community
United States
4589 Posts |
Ralp you can try soaking it again , but your coin looks good it has character, and it tells a story
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Pillar of the Community
United States
1582 Posts |
Okay - I'm gonna leave the capped bust half dollar alone, and, Jim, I may put the Morgan to soak again - it's been in acetone once - another soaking probably won't harm anything. I'll let you know. Ralph |
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Valued Member
United States
455 Posts |
It's easy to understand the enthusiasm around the type set, it's a great collection. I've been working on mine for a long time, but just picked up the 7070 earlier this year. With the album I've organized all my pieces and have a renewed interest in completing the set. I have issues with the album though, and I'm not sure it's the best storage solution for the coins. I find that some of the holes are very tight and the coin will only fit by applying a lot of pressure. I also find I must take great care to center the coin evenly in the holder to prevent unnecessary abrasion when sliding the plastic pane over the coin. A couple of times I saw tiny pieces of cardboard laying on the coin and had to go in and fix it. Also, we all know the set is expensive, especially in AU or better condition. While I like the organization and easy access the 7070 provides, I think the coins will be better off in air-tites. I recently bought air-tite albums for my proof quarters and halves. This may not be a logical alternative for the type set due to the varying sizes of the coins but I'm going to give it some further thought.
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Bedrock of the Community
United States
14454 Posts |
there is no question about airtites being more protective over the album, I just like mine being in the album myself. I don't really know why I just think it looks good when they are in there
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Pillar of the Community
United States
1327 Posts |
I hope in the next few week to get some beter picture of my set type set up soon. I am about half way done with mine. This is a great set, My only problem is like so many said it cost alot to put togehter and I don't want to just fell holes with any coin but want good examples of each. plus I ma trying to work on this plus other set and proof set all at the same time.
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Pillar of the Community
United States
834 Posts |
I picked up a very nice ex-fine 1878-s Trade dollar today I have been looking for one for sometime. This has been one of the hardest coins in this grade to find so far in my set. Bruce. |
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Posted 12/11/2006 8:54 pm
1886 S.jpg
86 S Rev.jpg
