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             Au              Pd                Ag               Cu

9ct         37.8           5.0             27.2              30.0

1Oct        42.0          4.66           25.36          27.98  

14ct         58.7          3.32          18.06           19.92  

18ct         75.2          1.99          10.85           11.96  

References

 Santa Fe Symposium on Jewellery Manufacturing Technology
1996 edition

'The Effect of Various Additives on the Performance of an 18 Karat
Yellow Gold Investment Casting Alloy'. Greg Norinandeau

'Alloying in the Small Workshop' A. P. Eccles
[1]   9 to 14ct. Yellow Gold Master alloy.

[2 ] 18ct Pt / PD White Gold Master Alloy

My thanks also to Aldo Reti for assistance with
some metallurgical terminology.

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Last modified: July 29, 1998