Comment: Yeah, excellent stuff.

(See in situ)

Yeah, excellent stuff.

Order it from any online chemical supply. You can just wash it with H2O + (~a little) HCl (muriatic acid; you could also use a lesser amount of Aqua Regia, in the unlikely event that you're following some ancient mediaeval-textbook process, or something) after you're finished, and then it's good-to-go for re-use.