Maplins has the hexahydrate, I thought there was two types:
hexahydrate and another anhydrous one?
Don't ask me if there is a difference, I haven't studied any chemistry
but on a website its said to use the hexahydrate not the anhydrous
one???
This etching chemistry is complicated...all I want to do is etch
small circuits in a little tub with the least amount of hassle with
easy availble and reasonably safe chemicals (ie I don't want to wipe
out a little part of swinton:-P)
PK
--- In Homebrew_PCBs@yahoogroups.com, "Phil" <phil1960us@y...> wrote:
> If you must use FeCl, don't get the pellets or powder. Its
> exothermic (I think this is the right term) when it reacts with
water
> and produces a lot of heat and splashing if you aren't careful.
> Makes a gawdawful mess. Nasty stuff.
>
> I agree with Stefan, CuCl is a better way to go (cheap, easy
> availability of components). Even Ammonium Persulfate is better
than
> FeCl (no staining and doesn't generate heat when mixed with water)
> though relatively pricey.