January 24 Through February 4—TUCSON, ARIZONA: Annual show
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Thu Mar 28, 2024 12:09 pm

All times are UTC - 4 hours




Post new topic Reply to topic  [ 4 posts ] 
Author Message
 Post subject: Bleaching
PostPosted: Fri Mar 29, 2019 12:27 am 
Offline
New to the Forum or The Quiet Type

Joined: Wed Mar 27, 2019 1:33 am
Posts: 1
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.


Top
 Profile  
Reply with quote  
 Post subject: Re: Bleaching
PostPosted: Fri Mar 29, 2019 1:58 pm 
Offline
Site Admin
User avatar

Joined: Sun Oct 16, 2005 12:22 pm
Posts: 21602
Location: San Francisco
I moved this to a more appropriate category


Top
 Profile  
Reply with quote  
 Post subject: Re: Bleaching
PostPosted: Sat Mar 30, 2019 12:55 am 
Offline
Valued Contributor

Joined: Thu May 28, 2009 4:13 am
Posts: 222
You can use oxalic acid as well in some cases.


Top
 Profile  
Reply with quote  
 Post subject: Re: Bleaching
PostPosted: Sat Mar 30, 2019 3:20 pm 
Offline
Gold Member

Joined: Mon May 26, 2014 9:42 pm
Posts: 1033
Just a warning. HF is INCREDIBLY dangerous.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 13 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Gemology Style ported to phpBB3 by Christian Bullock