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Techniques for CollectorsUsing asetic acid to disolve limeston.

16th Nov 2007 22:12 UTCIsaac Coblentz

I use vinegar to dissolve limestone/limy mudstone from silicate coral fossils. I usually scrape away the limestone/mud matrix, as it is dissolved figuring that this will speed up the process. I'm wondering if it is better to just let it sit for weeks changing the solution as needed and do any scraping after all the limestone is weakened or dissolved. I have used Muriatic acid for this, and it works much faster, but I live with kids and lack a secure space so I don't use it anymore.


Any tips on the chemical preparation of silicate fossils trapped in limestone would be appreciated.

18th Nov 2007 14:17 UTCGeorg Graf

Hi Isaac Coblenz,


I think, acetic acid is good: I works slowly. But that can be an advantage: Very delicate fossils, like sponge needles, may be destroyed from large CO2-bubbles generated from a stronger acid. "Good thing needs time!"


Greetings from Goslar


Georg
 
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