--- In
Homebrew_PCBs@yahoogroups.com, "Leon Heller" <leon_heller@h...>
wrote:
>
> ----- Original Message -----
> From: "Stefan Trethan" <stefan_trethan@g...>
> To: <Homebrew_PCBs@yahoogroups.com>
> Sent: Sunday, May 18, 2003 12:11 PM
> Subject: Re: [Homebrew_PCBs] ipa, ethyl alcohol
>
>
> > i'm wondering if there is methanol in any spiritus.
> >
> > i think you are right, this may dissove plastics.
> >
> > do you think there are also other substances used or it methanol
the usual
> stuff to make it undrinkable?
> >
> > i ask this because i thought till now denaturated alcohol is save
to use
> on plastics but i'm not sure if
> > there is any which isnt (and don't want a surprise).
Over here, Denatured Alcohol is sold in hardware stores as a paint
stripper for some kinds of paint.
Here's a site that lists denatured alcohol as a mixture of ethanol
(grain alcohol), isopropanol, methanol, and methyl isobutyl ketone:
http://hillbrothers.com/msds/denaalco.htmDefinitely not safe.
BTW, I believe "Ethanol" is shorthand for "Ethyl Alcohol", same for
the other varieties. Ethyl, methyl, ispropyl, etc describe part of the
chemical structure. I found this out while researching types of
cyanoacrylate for the NW Propmasters list. There is ethyl
cyanoacrylate and methyl cyanoacrylate, and various mixtures that go
into them to change their characteristics.
> > also the concentration of ethanol in "spiritus" varies over a wide
range.
> > from the full 96% achieveable by distilling down to 80% i read
everything.
> > i really HATE that tey don't write the ingredients on the bottles.
> >
> >
> > i will try to ask the manufacturer.
>
> In the UK, 'methylated spirit' is ethanol, methanol, pyridine (IIRC),
> parafin (kerosene) and a purple dye. Industrial 'methylated spirit' is
> simply ethanol and methanol, but is difficult to buy.
>
> Leon
What mixtures we make.
I use 99% isopropanol for cleaning VCRs and anything else that uses
magnetic media, occassionally I use denatured alcohol on the heads if
I get some hardened build-up. Only sparingly, though. Can be quite
nasty stuff.
Steve Greenfield