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 Question about ammonia

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PostSubject: Question about ammonia   Mon Apr 11, 2011 7:20 pm

Meron akong nakausap kanina na nag-aalala dahil meron nagpasok ng mga coins na ginamitan ng ammonia nitong nakaraang auction at baka magreklamo ang nakabili pag malaman nito na cleaned ang nabili niya.

Ano ba epekto ng ammonia sa coins??? Katulad din ba 'to ng silver cleaner na nagpapaitim ng silver coins pag matagal na sa storage???
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PostSubject: Re: Question about ammonia   Tue Apr 12, 2011 10:53 am

Ammonia will remove metal from the surface. The action is not so much on the dirt, but on the coin metal itself, i read...



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