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<p>[QUOTE=&quot;desertgem, post: 1880434, member: 15199&quot;]If you see a reaction occurring, the water being used is probably&nbsp; acidic ( not pH 7 for sure). Maybe not much , but de-ionized water can shift the ph&nbsp; acidic quickly, just by the absorption of carbon dioxide from the air, unless the water is in glass or impermeable plastic ( lab type) containers, not the thin plastic gallon water containers.</p><p><br /></p><p>Could someone from the ancient coin cleaner group explain why long soaks in water&nbsp; or other solutions is needed? I know some use wire brushes and dental picks also, so why not a short rinse and then physically remove the material? Not being snarky, just don&#039;t understand the long term use of any chemical.[/QUOTE]</p><p><br /></p>

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