[minima] Re: Build update on my Minima + Construction notes on my website
- From: Sunil Thomas Thonikuzhiyil <vu2swx@xxxxxxxxx>
- To: minima@xxxxxxxxxxxxx
- Date: Sun, 9 Mar 2014 18:06:09 +0530
I have used brasso for cleaning plain copper clads.
http://en.wikipedia.org/wiki/Brasso
On Sun, Mar 9, 2014 at 1:50 PM, Sandeep Lohia <sandeeplohia12@xxxxxxxxx>wrote:
> Iso-Propyl ( transparent ) those bottles available here are only
> water with a bad smell ( duplicate )...
> It's no Alcohol it's only & only water !!!
>
> Original always comes deep-yellow.
>
> dilute little Rosin in Iso-Propyl, if it mixes it's well & good otherwise
> not.
>
> Nail polish remover from YL / XYL also works well.
>
> U can also do a little rub with very fine Glass-Paper, Emry-paper.
> before applying conformal coating-rosin. ( don't use steel-wool, it
> can cut hand )
>
> Recently from goldsmith market, I brought pink color powder,
> I don't know what chemical formula it is, it might be just powdered
> glass, kids use here on thread that of kites. or could be a mixture of
> little Zinc Chloride.
> It is for cleaning oxidized copper/bronze statues, & working very well
> with PCB.
> there was also available some other color powders/gels as to clean
> silver, gold but I didn't purchased that.
>
> It is hard to solder on oxidized copper clad/foil if not filed. even
> most skilled won't be able...
> sometimes it takes no longer more then a hour on cleaned copper to
> gather a fine coat of green or black rust, & soldering becomes
> difficult thereafter...
> on those copper foil or clad ( without pre-tinned -homebrew)
>
> but if we can do a little conformal coating Rosin imminently after
> cleaning,
> solder will stick to copper like magnet.
>
> //www.freelists.org/post/minima/Copper-sheets,7
>
> -------------------------------------------------------------------
>
>
> Sir Thomas,
>
> U can also rub clean with ink-pen rubber / eraser before Rosin-Coat,
> if copper-clad already lost it's shine, & if already changed it's
> color...
>
>
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