[Jewelry making - Article 01223] - Re: [Orchid] Black Blobs in my Sterling

[Daniel Grandi]

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

    I Agree with Peter Row that the metal Blob problem is not caused by
    Standard (copper/silver) sterling alloy. 

    I'm 99% sure of is that it is caused by Some form of DeOx sterling...
    There are many deox sterling alloys on the market and having tested
    about 8 varieties, I can remember seeing some black blobs on
    castings ... It was caused by overheating the metal and /or using a
    high oxygen concentration in the flame. It is definitely possible to
    bring out some black ooze on certain deox materials when it is heated
    too far.. 

    Some of these alloys contain metals like Tin and other low melt
    materials that can come out of the alloy when over heated. Hope this
    is helpful. 

Daniel Grandi
Racecar Jewelry Co. Inc
Tel: 401-461-7803

____________________________________________________________________
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
____________________________________________________________________