Hello all.

Happy New Year.
I am trying to make 20ct 833 rose gold alloy, mixing 83.3% Pure Gold and 16.67% of Silver+copper.
I just wanna do little tint of pinky yellow gold.
Can you recommend me a good composition of Silver and Copper?
Is there anything I have to aware of?

Also other question about 18ct gold,
Some people do '75%gold + 12.5 silver +12.5 Copper' or '75%Gold+ 15%copper +10%silver'.
Would you be able to tell me which composition will be easier to work on it?
75%gold + 12.5 silver +12.5 Copper alloy will make less crack?

Many Thanks