Originally Posted by
keith66
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.