[Jesper]

Hi

I'm considering melting and mixing/combining gold, copper & silver to make a well-mixed alloy of these metals. The alloy is be app. 75% gold, 18% copper & 7% silver.

However, before doing so I would appreciate guidance as to if there's something I should pay attention to during this process. The goal is to obtain a thin - very pure (no oxidations or the like) - well mixed - metal foil alloy of these metals (~2-5 mm thick) which subsequently is to be rolled to thinner foils (~30*10-6 meter thickness).

My question is if I, to obtain this non-oxidated metal foil alloy (the 2~5 mm thick foil), have to make the process happen in a non-oxidative environment? Or can I "just" heat the metals in a suitable "bowl" and then let them mix by themselves (I realize temperatures are high)? Or if oxidations will happen can I then remove them afterwards in an environmentally friendly way?

Maybe there are other issues to observe as well while making this process ...?

Any assistance on how this can be done is appreciated 

Greetings,

Jesper

[Mamoon_pk]

Jesper, why making foil, it is already available in market but not gold, its aluminium and copper. I am sure it will fulfill your purpose.

Thanks
Mamoon your Rasheed

[Stepan]

You will need flux to remove impurities and oxides from alloy, as well as to protect copper from oxygen. This is well developed area, you need to find jewelery and goldsmith's forum. I used flux in the past but do not remember what it was. Something with borax.

If the batch is small (under 50 g) you do not need mixing, gentle shaking will do the job. Be sure you use high purity ingredients. Some impurities like Sn, and Sb, make gold hard, and it will crack while you are making the foil.