Hi
I make gold cast rings and it is very difficult to get mirror finish inside the ring with normal polishing
so I tried to put a ring in aqua regia and it started to remove some roughness , I removed the ring washed it, and I noticed that there is grey layer that could not be removed
even after annealing it and putting it in Hydrochloric acid this is my experiment and I want to know
1 what caused that grey layer and how to remove it
2 is there any chemical better than aqua regia to be used for gold finishing
your help will be much appreciated Thank you
I make gold cast rings and it is very difficult to get mirror finish inside the ring with normal polishing
so I tried to put a ring in aqua regia and it started to remove some roughness , I removed the ring washed it, and I noticed that there is grey layer that could not be removed
even after annealing it and putting it in Hydrochloric acid this is my experiment and I want to know
1 what caused that grey layer and how to remove it
2 is there any chemical better than aqua regia to be used for gold finishing
your help will be much appreciated Thank you