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Author Topic: BRONZE DISESASE? I live in fear!  (Read 1438 times)

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Offline dpaul7

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BRONZE DISESASE? I live in fear!
« on: December 16, 2006, 11:22:36 am »
Hi all --

I am familiar with Bronze disease on modern coins; not sure on ancients... and I am sort of worried about this one that arrived today! I poked at it a bit with a toothpick.... no powder came off... but would like some opinions! 

Bronze Disease... I hate it!

dpaul7
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bruce61813

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Re: BRONZE DISESASE? I live in fear!
« Reply #1 on: December 18, 2006, 03:04:52 pm »
Looking at the pits, I suspect that it is BD. Under the fuzzy green, BD will form a hard type as it progresses, and will be pale, almost a white, green. I would treat this now, you will have some pitting, but it won't progress. I had though about using one of the compunds used for re-storing wood that has been dry rotted. I  [in theory] would soak into the green area and harden it[ one type is called "wood petrifier"], also make it water proof so no further moisture could be absorbed. The main draw back is that it would be one way as far as I can tell, but I have not tried it as of yet. I would go for the standard treatment at this point.

Bruce

Offline dpaul7

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Re: BRONZE DISESASE? I live in fear!
« Reply #2 on: December 19, 2006, 05:57:28 am »
Thanks, Bruce....

Yes, I believe it is BD - I tried a pin on one of the pits, rather large bits of green powder surfaced.  Have begun treatment... hope I can save it!

Your idea about wood compound sounds interesting!  If you try it, let me know how it works!

dpaul7
Age. Fac ut gaudeam.
Aliena nobis, nostra plus aliis placent
https://www.forumancientcoins.com/gallery/index.php?cat=17252

Bohemond

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Re: BRONZE DISESASE? I live in fear!
« Reply #3 on: December 19, 2006, 11:45:33 am »
Dub in distilled water, change every other day and continue for a few weeks and it should be fine. Good luck!

And you are not the only one who hates BD ;)

Bohemond

Offline dpaul7

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Re: BRONZE DISESASE? I live in fear!
« Reply #4 on: December 19, 2006, 04:33:40 pm »
Bohemond -

Thanks for the reply!  The coin is soaking now!  It's not very valuable... but I like it.  Hope I can save it!  I just hate the thought of something that old suddenly being destroyed!  I will be sending for some of the sodium carbonate chemical to further treat if necessary!

dpaul7
Age. Fac ut gaudeam.
Aliena nobis, nostra plus aliis placent
https://www.forumancientcoins.com/gallery/index.php?cat=17252

bruce61813

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Re: BRONZE DISESASE? I live in fear!
« Reply #5 on: December 19, 2006, 06:07:07 pm »
those pits don't look to  deep, but they wiil be raw looking. After treatemnt, leave the coin in a sunny spot and exposed to the air, or put it in the oven at about 250 for 30 minutes or so, especially a gas oven, it will accelerate oxidation and trurn the surface a bit browner.

Bruce

 

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