Homebrew PCBs

At $50 a go, i dont think it is cost effective, but prob will work

Howard


On 29 March 2010 14:31, Mark Lerman <mlerman@...> wrote:

>
>
>
> Do you think porous polyethylene rod would work as a bubbler? See
> <
> http://www.smallparts.com/Polyethylene-Porous-Diameter-Average-Microns/dp/B000FN1FCY?ie=UTF8&qid=1269869358&sr=1-14&pf_rd_r=151FSQ0N41GE7V0WYX7V&pf_rd_m=A2LPUKX2E7NPQV&pf_rd_t=301&pf_rd_i=0&pf_rd_p=493388211&pf_rd_s=center-3
> >
>
> Mark
>
>
> At 08:24 AM 3/29/2010, you wrote:
> >You don't need to add more copper. The dark green is cuprous chloride.
> >Add more H2O2 or bubble air through it to convert it to cupric chloride.
> >It will turn a lighter green as it converts. You may need to add acid if
> >it doesn't etch very well. IME bubbling air through it takes quite a
> >long time. You need fine air bubbles like you get from an air stone but
> >air stones disintegrate in the acid.
> >
> >Les
> >
> >Howard wrote:
> > > Hi
> > > I have been doing etching with HCI (Spirits of salt 32%)
> > > and H202 (6%) in a mix of 1 part HCI to 1 part H202, in small
> > > amounts (.5ltr), after etching i then put the acid into a 3ltr
> > > bottle, now the bottle is full of medium to dark green stuff!
> > >
> > > So now i would like to make use of it to make CuCI.
> > > Now i think that i need to add some copper to the mix and pump
> > > some air in.
> > >
> > > I have a Mega-UK type of tank with a built in air pump and heater
> > > it holds about 5ltrs. Could i just put the 3ltrs of used mix into
> > > the tank, add some copper(how much?) and turn on the air(how long for?)
> > >
> > > When will i know when it is converted to CuCI ?
> > >
> > > Hope that someone can put me right on this
> > >
> > > Regards
> > > Howard
> > >
> >
> >
> >
> >------------------------------------
>
> >
> >Be sure to visit the group home and check for new Links, Files, and
> Photos:
> >http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> >
> >
> >
>
>  
>



-- 
73's Howard G7LQY
GQRP: 12549
Loc: IO83UO
LARGE FILES TO: hjpayneg7@...


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