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Removing "Mint Set Haze" from Clad Coinage
halfcentman
Posts: 1,498 ✭✭✭
A lot of times the haze that is produced on US Mint Set coinage is related to the packaging degrading on the coin, especially if they have been exposed to heat.
Has anyone had any success using MS70, or anything else, and if so, what procedure do you use? I don't want a coin that will be temporarily OK, and have it ending up as a "dip burn" example like a silver coin.
Any advice, public or by PM would be appreciated. I have a reason why I am asking this. I'm not dipping pocket change!!
Greg
Has anyone had any success using MS70, or anything else, and if so, what procedure do you use? I don't want a coin that will be temporarily OK, and have it ending up as a "dip burn" example like a silver coin.
Any advice, public or by PM would be appreciated. I have a reason why I am asking this. I'm not dipping pocket change!!
Greg
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A few seconds dip, then a water rinse, then a distilled water rinse then acetone and blow dry.
bob
Well, just Love coins, period.
between the pliofilm and the coin that probably has PVC in it. It is most problematical for
1969 mint sets but affects them all to varying degrees. The toning starts as a mottled
brown and green that is actually rather attractive but soon becomes dark and ugly. Most
of the coins can still be saved.
You probably should experiment a little with this but I start with a mixture of 91% isopropyl
and denatured alcohols (~2/3rds denatured) and after a two to twenty four hour soak rinse
them in warm water and pat dry. This will fix about half of those that are fairly well advanced.
Next comes a protracted soak in acetone. It should be very clean and there rarely is any im-
provement beyond a couple days. Again rinse with warm water and pat dry. This will fix 75%
of what was left.
It is critical that there is as little water as possible in any mixtures as it will cause irreversible
spotting. Use 91% if you use isopropyl and not old alcohol which will become weaker as the
alcohol leaves solution prefentially to water. It seems that drying with plush toweld would
cause damage but it doesn't seem to. I lay a line of wet coins on the towel and fold a dry part
over them gently pushing straight down and then flip the line over and pat a second time. Be
sure the towel isn't making marks. You might even try mishanding one so you can see what
sorts of marking to watch for.
Cover any dishes used in the soak and be sure that there are no sparks or ignition sources where
they are used or stored.
Good luck.
<< <i>I've used Ezest on Ikes for that blue haze that forms on the Mint Issued brown box coins.
A few seconds dip, then a water rinse, then a distilled water rinse then acetone and blow dry.
bob
Arn't Brown Box Ikes 90% silver ?
<< <i>
<< <i>I've used Ezest on Ikes for that blue haze that forms on the Mint Issued brown box coins.
A few seconds dip, then a water rinse, then a distilled water rinse then acetone and blow dry.
bob
Arn't Brown Box Ikes 90% silver ? >>
The outside cladding is 80%.
Try it --you'll like it!