How to clean the touchstone
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- čas přidán 22. 08. 2024
- In this video you will learn how to clean the gold samples from your previous assays on the touchstone for karat identification.
This method is used only if the porosity of the stone is adequate to mark your samples and you do not want to alter it.
I leave you the links to the safety sheets for handling nitric acid:
quimica.unam.m...
The MSDS for hydrochloric acid is:
quimica.unam.m...
If you want to know more about the touchstone, you can find all the information in the following article:
tasacionparato...
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