Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Sorry NOT cost effective

Howard

On 29 March 2010 14:37, Howard Payne <howard_g7lqy@...> wrote:

> 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@...
>
>


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


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