Homebrew PCBs

Either is aggressive against polystyrene.  For instance, those white foam 
expanded polystyrene cups cannot survive PGA (as if anybody could stand to 
drink it straight).

I have gotten away from the denatured stuff due to the stink.  I buy bottles 
of PGA (Everclear) and use it for flux cleaning.  I pay the outrageously 
high tax on it that way, but I use so little, it is much easier to do that 
than to buy it from a chemical supplier.

Syd


----- Original Message ----- 
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, November 28, 2006 4:58 AM
Subject: Re: [Homebrew_PCBs] Isopropyl Alcohol 90%


> On Tue, 28 Nov 2006 06:43:34 +0100, Syd H. Levine
> <wireline@...> wrote:
>
>> Ethanol will most definitely attack polystyrene and its cousins.  If you
>> have not noticed it, it is because you have not been handling true
>> polystyrene.  It does not attack most other plastics.  My paper towel
>> dispensers in the shop are polystyrene, and if my fingers are wet with
>> ethanol, they will stick to the darn things and leave fingerprint marks.
>
>
> I'll try again then!
>
> Did you use pure ethanol or a denatured variety?
>
> ST
>
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