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Subject: Re: [Homebrew_PCBs] RE: Copper plating material(s) for a neophyte - tinning brush

From: "Stefan Trethan" <stefan_trethan@...>
Date: 2006-01-11

I think isopropyl alcohol would work too.
But i prefer ethanol because i have found it the better solvent in many
cases, and the smell is much better too.
It's also more readily available here than IPA, but i buy both at the same
place so that does not matter so much.

IPA takes on water easily i hear, i'm not sure but i think this is less of
a problem with ethanol.

I dunno about the additives, all sorts of stuff can be added i have read,
i'll write my supplier a mail maybe they can find out.
If you ever have gotten traces of the stuff on your lips (like you clean
some sort of tubular item and blow through it afterwards) you
would have found immediately that you don't never ever want to drink that
stuff. Even tiny traces of it taste awful on the lips.

I have not the slightest idea why in the US IPA seems so much more common,
and here in europe ethanol seems so much more common.
IPA is practically only used at doctors offices in sterilizing pads for
injections here, when i bought my first bottle not that long ago and took
the lid off i got a very unexpected very strong kind of flashback reaction
telling me that. I had never smelled it anywhere else before.

ST


On Tue, 10 Jan 2006 22:42:01 +0100, Blair, William <William_Blair@...>
wrote:

> Isopropyl alcohol is quite a different thing, but which is most
>
> usually found on drugstore shelves labeled as "rubbing alcohol"
>
> or just "alcohol." It doesn't need to be denatured since nobody
>
> wants to drink it in the first place.
>
>
> I don't know if any of this makes any difference but it wouldn't
>
> be the first time if it did. I assume colophony resin dissolves
>
> in any sort of alcohol, regardless of the presence or absence of
>
> methanol. But, if colophony resin _won't_ dissolve in isopropyl
>
> alcohol, then an effort will be needed to find genuine denatured
>
> ethanol. And, if that's hard to find (as it is here), then I say
>
> just use Vodka (unless, for some odd reason, the colophony resin
>
> actually does require at least a little bit of methanol, say 10%
>
> or so).
>
>
> --
>
> WB