Magic Cast substitute

Jewelry Discussion
1

Have heard that a copper penny will substitute for Magic
Cast. Was told the ratio was about 3/4 of a penny to one
ounce of gold. Does anyone know if this is true and if there
is a more accurate formula? Also, are there any other jewelry
forums, newsgroups, mailing lists available besides ArtMetal?
Gayle Morris Atlanta and Tucson

2 
   Have heard that a copper penny will substitute for Magic
   Cast.  Was told the ratio was about 3/4 of a penny to one
   ounce of gold. Does anyone know if this is true and if there
   is a more accurate formula? Also, are there any other jewelry
   forums, newsgroups, mailing lists available besides ArtMetal?
   Gayle Morris Atlanta and Tucson

I’m not sure what Magic Cast is. I do however know that zinc is burned
out of overworked 14K golds. Pennies made today are copper plated
zinc. Do you see some connection here?

= http://www.knight-hub.com/manmtndense/bhh3.htm e-mail:
@Bruce_Holmgrain snail mail: POB 7072, McLean, VA
22106-7972, U.S.A.

3

Orchidians…

Have heard that a copper penny will substitute for Magic Cast. Was
told the ratio was about 3/4 of a penny to one ounce of gold. Does
anyone know if this is true and if there is a more accurate formula?

Orchid Rocks!
Morris in Atlanta

4 
    Have heard that a copper penny will substitute for Magic Cast.
 Was told the ratio was about 3/4 of a penny to one ounce of gold.
Does anyone know if this is true and if there is a more accurate
formula?

I don’t know what Magic Cast is, but I would suspect that it is zinc.

The 14K yellow that I usually make contains 6.66% zinc. As remelting
this metal causes some of the zinc to evaporate off, eventually, my
yellow gold will start to turn pink and will begin to oxidize too
easily. I have gone to the length of bringing the metal to a white
heat to burn off the rest of the zinc, and then to replace the zinc
in the proper amount, but you may find this a little drastic.
Pennies made in the last 20 or so years are copper plated zinc. Your
formula is probably pretty close. Remember not to add so much zinc
as to lower the intended karat.

Bruce D. Holmgrain
http://www.goldwerx.com
@Red_Rodder
JA Certified Master Bench Jeweler / CAD/CAM Solutions

5 
Have heard that a copper penny will substitute for Magic Cast. 
Was told the ratio was about 3/4 of a penny to one ounce of gold.
Does anyone know if this is true and if there is a more accurate
formula?

The magic cast product provided much better results than a
zinc/copper penny. Magic cast replenishes the gold with trace
elements that produce fire scale free castings, and also contains
elements that off-set undesirable contaminants such as solder. Try
both and you will see the difference!

James Gilbert
Stuller Metals
800-877-7777