Gold alloy for oxidizing

Hello,

I have heard that there are better alloys for Gold (14, 18K, etc)
that make blackening gold easier. I am not very familiar with this
area but I have read that a more silver base in the alloy helps.
Then heating the piece and using a silver/gold blackener from stullar
works. Does anyone have any experience in alloy compositions that
would be better suited for blackening?

Thanks,
HB