Buying Nitric Acid for the First Time

[Jhuff8181]

I'm rounding up supplies and am now ready to order nitric acid. Unfortunately I'm unable to find a local supplier in New Hampshire so I have to order it online. I've found 67.2%, 69% and 70%. The costs vary slightly but which one is best or will they all work? I've watched Steve's video and saw that he used 70%. I have several pounds of gold filled jewelry, glasses frames, etc. to process. Thank you for your help and suggestions.

 

[solar_plasma]

my 65% works great on gold

 

[lazersteve]

Gold Filled scrap requires diluted nitric acid. Any nitric acid around 35-40% should work great. Higher concentrations will need to be diluted with distilled water before use.

Steve

 

[Jhuff8181]

Thank you Steve. I saw that in your video you diluted the nitric acid and was wondering if I could just use a lower concentration, now I know.