Here is composition of 18K palladium gold:
This 18K is beautiful worm white.extremely flexible ,and easy for
setting.The formula was used by old Jeweler friend for years and I
use it for last 20 years with excellent results.I never used
rhodium,just white , well cut diamonds.With today’s price of
Palladium, it is excellent choice.I premix gold , copper and silver
then put palladium /preferably in sheet form/ on top, melt it ,
turn"belly up" and melt it again.Works every time.