Homebrew PCBs

Russell Shaw wrote:

> 
> I will use nothing else.
> I haven't made a mess since using it the last 50+ times
> It lasts forever. Just cover the container. Add a bit of HCl
> every few months.
> It's an excellent weed killer. There's rarely a reason to dispose
> of it, so it's more enviroweenie friendly than most others.
> Only expensive in retail shops. Buy it in bulk as "Profloc F" for
> $2/Lt.
> Once you have a tank set up, there's little reason to buy much more.
> 
> Profloc F is a sewer treatment floculating agent iirc.
> I got 30Lt of the stuff. Anyone in the local electronics clubs can
> get it from me cheap.


I should know already to not step on the long experience off so much of
you in here. You use it better than i did, or most people do. My comment
intention was to point the younger people who in my view should be
buying muriatic acid, peroxide, food container, air pump instead Ferric
Chloride. And where i live all those things can be bought in one place
only and at same price of 1Kg Ferric Chloride in a electronics supply
store. 

Not as homebrew, but in a moment of my short life, i also did use more
than 100L of it in 40%, in a spray machine. And although in theory FeCl3
can old much more copper in solution than other etchants, the etch
quality decrease really fast with copper content. The etchant choice or
setup wasn't my call, companies like megauk and bungard say to schools,
universities and small dumb board houses that FeCl3 is the best thing
around since they earn big money selling it over and over again. And
these people simple buy it locally and stay ignorant happy about
etchants. While they could be using CuCl auto regenerated in the spray
chamber, given better stable results along etchant usage, cheaper and
even easier to get. 
Unfortunately the first thing i read about CuCl was that it was used in
the early 60's. Got from copper mines, used as etchant and returned to
copper mines without regeneration, by the transport price only, before
copper mines changed to sulfuric electrowining. This should be super
wrong but keep me away from using it earlier. 

So instead of saying 'X is better' we should present 2 or 3 options to
everyone always, don't you agree?