You will have to use distillation set up.
Ya must be kidding
Back when playing with B & W film (dating myself) I used to buy it
over the counter at local photo type stores for a few bucks.
Pretty good for a cheap stop bath when diluted, these days probably
a hazmat shipping charge but one of the most gentile acids a jeweller
Some nasty chemicals are a normal part of jewellery work, attempting
to make them at home scares me. Learn to use them and just pay the
price of hazmat and being included on watch lists
Hard core old school jeweller offering advice and I’m still alive.
Analog/Digital Modelling & Goldsmithing