I've just managed to get hold of some HCl from a local hardware emporium.
It's difficult to find, here in the UK, for some reason, although it is
often used for cleaning drains and brickwork.
If anyone else in the UK is interested, it is packaged by Blanchard's and
sold as Spirits of Salts. It's 32% HCl. Someone behind me at the counter was
rather intrigued as to what I was going to do with it. 8-) Blanchard's also
package the NaOH I use for developing PCBs - that is easier to find. Both
HCl and NaOH are in distictive red plastic bottles.
Blanchard's are in London: 237 Walworth Road, SE17. They must be near the
Labour Party HQ. They might have some other useful stuff.
I can now make my FeCl3 last longer, and experiment with HCl/H2O2 and CuCl3
etchants.
Leon
--
Leon Heller, G1HSM
leon_heller@...http://www.geocities.com/leon_heller