[Jewelry making - Article 00819] - Re: [Orchid] Gilding with gold chloride

[kalanidhi2nd]

========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

hello Raja,

>     I went through the depletion gilding page and I aminterested in 2
>     things. First, can metals be gilded with AuCl3 without precipiting
>     the gold powder like gold is gilded onporcelian by fire gilding. 

    regarding your first question, in India the gold jewellery polishers
    (mainly Bengalis) used two types of processes: 

    a) Depelation (in local lingo Chatka) where in the alloy on the
    surface gets dissolved in hot acid pickle and pure gold remain. 

    b) the other process (Rang) where in the gold on the surface too
    gets dissolved (presumably in Aqua Regia and becoming AuCl) and the
    same gold gets deposited on the surface by addition of some salts or
    other chemical. 

    since i personally have not done either of the processes, i dont know
    much about the process in detail. but i think you may find some
    Bengali polishers in Kathmandu and know more from them. they may be in
    and around the jewellery market in your area. 

thanks,
Hitesh Satikunver
Tanvi Arts
Mumbai (India)

____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________