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 Post subject: Bleaching
PostPosted: Fri Mar 29, 2019 12:27 am 
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I am a Assistant Research officer at Gem & Jewellery Research & Training Institute ,Which is a government Body.

These days I am practicing with bleaching for some opaque stones for them to get cleaned from other minerals and materials from their surface and cracks.

I have selected HF, Acetone,Aqua Regia,and Hydrogen Peroxide.

If anyone knows the correct concentration of these bleaching agents for the best practice.

Also if any other suitable agents than this ?

Thank You.


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 Post subject: Re: Bleaching
PostPosted: Fri Mar 29, 2019 1:58 pm 
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Location: San Francisco
I moved this to a more appropriate category


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 Post subject: Re: Bleaching
PostPosted: Sat Mar 30, 2019 12:55 am 
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You can use oxalic acid as well in some cases.


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 Post subject: Re: Bleaching
PostPosted: Sat Mar 30, 2019 3:20 pm 
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Just a warning. HF is INCREDIBLY dangerous.


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