[Jewelry making - Article 00617] - Re: [Orchid] Copper to silver weight conversion factor

[Kevin Courter]

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

Hello Marc,

    I found this table:
    http://www.jccojewelrycastingservices.com/metal_conversion_charts 

    which says to multiply weight in copper by 1.16 to get weight in
    sterling. 

    and then tried to verify it using some lower level numbers:
    pure copper: 8.93 g/cm^3
    pure silver: 10.49 g/cm^3
    Sterling: 0.925 silver, 0.075 (mostly) copper

    (percent silver)*(mass silver) + (percent copper)*(mass copper) =
    mass sterling alloy 

    0.925*10.49 + 0.075*8.93 = 10.37 

    So a cubic centimeter of sterling should mass about 10.37 grams,
    while a cc of copper should mass 8.93 grams... meaning the sterling
    is 1.16 times more massive. Yay! 

Kevin
____________________________________________________________________
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
____________________________________________________________________