Do you have a digital camera? Can you take a photo
of your solution? When you have something that looks
like http://www.techfreakz.org/cucl2/?slide=5
the solution is probably right.
If you're getting brown or sludge, then first bubble
air through it or add H2O2. If that doesnt help, then
start adding HCl until it turns blue-greenish.
Adding too much HCl won't slow down the reaction
but not having enough CuCl2 will.
Here's another idea:
does anyone know if copper powder is cheap?
The reaction would likely go a lot faster
since the suface area of powder is drastically
greater than when using plain old scrap wire
or boards.
~rolan
--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
of your solution? When you have something that looks
like http://www.techfreakz.org/cucl2/?slide=5
the solution is probably right.
If you're getting brown or sludge, then first bubble
air through it or add H2O2. If that doesnt help, then
start adding HCl until it turns blue-greenish.
Adding too much HCl won't slow down the reaction
but not having enough CuCl2 will.
Here's another idea:
does anyone know if copper powder is cheap?
The reaction would likely go a lot faster
since the suface area of powder is drastically
greater than when using plain old scrap wire
or boards.
~rolan
--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:
> I see...writing the post.
>
> Thanks for the explaination.
> I already had the idea that basically the same might happen after
>adjusted.
> But i don't fully understand why all of these 3 parameters must be
> I only adjust one, the color. If to brown it doesn't work and H2O2(obviously regeneration) is added.
>say if there is any brown mud
> The density: I don't monitor at all. But my H2O2 and HCl guide did
> settling on the bottom simply filter it through filter paper to getit out.
> from the page you mentioned: "Etch rate will slow down and sludgemay form with increasing density" -
> has this experienced one of you? is this really happening?if not bying the cucl but rather
> Is the homebrew Hydrometer enough for normal work? but how to start
> starting with etching solid copper (or using my now in use fluid)?How exact has this to be?
> Isn't there another method of getting the copper out (electrolyticdeposition?)?
>stirrer and indicator etc.
> Acid concentration:
> I also don't monitor it, but it is too high, get fumes i think.
> I don't like the titration, i don't like buying a buret and a
> But i believe this is quite important if bubbling...oxidizeable material?
>
>
> Also if only 3% HCl:
>
> Don't you get a lot of fumes from bubbling attacking any nearby
>but my knoweledge about chemistry is
>
> I principially like this idea of regeneration (not bying any H2O2)
> very poor.
>