Hi Derek, it was me who actually asked the original question :)
I planned on using MG Chemicals Nickle conductive primer spray, and then
brush plating with copper. The polystyrene forms are nice because you can
fill any small dents with sandable filler or even hot glue.
My first attempt at making copper rings failed because although I made a
'perfect' circle I could not get a clean joint. If I had a welder, grinder,
and a place to use them I might be able to do better.
In the meantime this seems a quick and easy method I can do with few tools
in limited space (fan with window open when needed of course).
Thanks,
Matt
On Tue, Oct 16, 2018, 8:01 PM Tesla <tesla@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
> Antonio,
>
> I've tried to make spheres with conductive paint
> https://www.bareconductive.com/. You need a very good surface for the
> paint to adhere and to give a smooth end finish. I haven't tried spray
> painting, but I'm told it is possible.
>
> I'd start with a primer on to the polystyrene, to seal, give you a
> good surface finish and help the conductive paint to adhere.
>
> I found that diluting the conductive paint 50/50 gave the best
> finish on to a smooth plastic surface although with a higher resistance
> than 100% paint.
>
> I would love to see your results..
>
> Derek
>
> On 15/10/2018 19:35, Antonio Queiroz wrote:
> > Em 15/10/2018 11:39, Matthew Sweeney escreveu:
> >> As title suggests, I'm planning as follows:
> >>
> >> 1. Various sized cheap polystyrene rings (e.g 4x1 inch)
> >> 2. Prime with nickle or graphite spray paint.
> >> 3. Brush copper plate.
> >> 4. Polish/Buff
> >>
> >> The purpose is for primary charge induction and trap terminals in a
> >> Kelvin
> >> thunderstom machine, and for investigating constuction of cheap Corona
> >> rings.
> >>
> >> Has anyone tried this method previously, or have any
> >> suggestions/recommendations? Note this is intended as a cheap method
> >> even
> >> If the results are not 'perfect'.
> >>
> > Adhesive aluminum tape is good for this purpose. No need for any
> > priming and the result is quite good.
> >
> > Antonio Carlos M. de Queiroz
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