Fried A Coin

Sequitur

This is a job only gototoningcoins (tonecoin2003) could love. The 1968 clad quarter pictured below had all kinds of junk/haze in the fields. Because it was a garbage quarter, I experimented with undiluted dip and a plain tapwater rinse. The results after five minutes:




It was so fried the coin turned colors before my eyes. The lessons are, first, don't dip clad coins, and two, make sure you neutralize diluted dip.

Now I followed proper procedures with this Franklin (had a couple spots), and it came out just fine -- distilled water for dilution and isopropyl make all the difference between a mild cleaning to preserve and a nuclear razing.

nwcs

Actually, I've dipped a few clad coins as experiments without a problem. Although my procedure is different. I don't use diluted dips but dip only for about 2-4 seconds. Then I rinse off in a stream of water and then neutralize the coin in a bowl and then do a final dry off with pure acetone which evaporates the water.

Sequitur

I don't use diluted dips but dip only for about 2-4 seconds. Then I rinse off in a stream of water and then neutralize the coin in a bowl and then do a final dry off with pure acetone which evaporates the water.

I basically did exactly that, minus the acetone. Perhaps I was too slow in getting to the water stream or didn't leave it under long enough. I'll experiment on some more garbage clads.