Quote Originally Posted by keith66 View Post
You could still still buy hydrochloric acid in old fashioned ironmongers until recently under the name "spirits of salts", law tightened up on it a few years back following the rise in acid attacks. But you can still buy the stuff online, I bought a 25kg sack of ammonium sulphamate last year for weed killing & got it from Mistral chemicals in Northern Ireland, they do a big range of chemicals, just looked & quite a few bluing & browning chemicals are on their list.
That is interesting, thanks. I have made a note of the details.

Atb