Yeah but you end up with a chemical that is hazardous to the environment (because of the copper that ends up in it) and therefore tricky/time consuming to dispose of. The alternative uses peroxide and an acid (can't remember the chemical name but it's also known as 'pool acid' so something chlorine based) which is highly corrosive to the skin but virtually never needs to be thrown away - Just reoxygenated.
Maybe if I didn't live in a completely carpeted rented flat with a tiny kitchen and maybe if I wasn't inherently clumsy I would be more keen on the idea... Timothy Lee Rayner -----Original Message----- From: peterboro-boun...@mailman.lug.org.uk [mailto:peterboro-boun...@mailman.lug.org.uk] On Behalf Of Malcolm Hunter Sent: 16 July 2009 17:26 To: Peterborough LUG - No commercial posts Subject: Re: [Peterboro] Slightly off topic this. > On 16/07/2009 Timothy Rayner wrote: > > but the actual etching itself seems dangerous and high > > maintenance. > > not really, you just sit it in a ferric chloride solution. > > Maplin sell stuff > http://www.maplin.co.uk/searchtemplate.asp?criteria=PCB%20ETCHING%20KIT > > MSDS at http://msds.chem.ox.ac.uk/FE/ferric_chloride_solution.html > > don't drink the solution, wear gloves and you'll be fine. Just to second Phil - I've done it myself and the hardest bit was timing it just right so that the tracks don't look like they've been nibbled at. Malc -- Technical copy-editor & proofreader KDE Proofreading Team KDE British English Translation Team http://l10n.kde.org/team-infos.php?teamcode=en_GB Facebook: http://www.facebook.com/FriendlyAtheist Neu: GMX Doppel-FLAT mit Internet-Flatrate + Telefon-Flatrate für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02 _______________________________________________ Peterboro mailing list Peterboro@mailman.lug.org.uk https://mailman.lug.org.uk/mailman/listinfo/peterboro _______________________________________________ Peterboro mailing list Peterboro@mailman.lug.org.uk https://mailman.lug.org.uk/mailman/listinfo/peterboro
