How to clean the touchstone

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...
If you liked the video, leave your like, make a comment and don't forget to subscribe to this Channel so you don't miss the next videos that I will be uploading.
Turn on the notifications 🔔🔔😃
I recommend you also watch the video:
HOW TO CURE TOUCHSTONE • Como curar la piedra d... 😁👍
#comolimpiarlapiedradetoque #pruebasdeoro #goldentest #joyeria #comocurarlapiedradetoque #oro #appraisers #appraisals #tasaciones #piedradetoque #touchstone #oro24k #calado #caladooro #howtocleanthetouchstone #tutorialesoro #goldappraisaltutorial #goldenappraisal #comocurarlapiedradetoque