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RiscPC problem

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  RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-22 15:46 +0000
    Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-22 16:28 +0000
      Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 00:30 +0000
        Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-23 10:02 +0000
          Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2011-12-25 19:51 +0000
            Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-26 02:02 +0100
              Re: RiscPC problem Dev <spam-addy@no.spam.invalid> - 2011-12-26 09:31 +0000
                Re: RiscPC problem Dave Symes <dave@triffid.co.uk> - 2011-12-26 18:38 +0000
                  Re: RiscPC problem Chris Shepheard <chris.shepheard@chrispics.co.uk> - 2011-12-26 18:54 +0000
                    Re: RiscPC problem Dave Symes <dave@triffid.co.uk> - 2011-12-26 21:16 +0000
                    Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-03 21:05 +0000
                      Re: RiscPC problem Chris Shepheard <chris.shepheard@chrispics.co.uk> - 2012-01-03 21:36 +0000
                        Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-03 23:50 +0000
                        Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2012-01-04 09:06 +0000
                          Re: RiscPC problem cferris@freeRemoveuk.com.invalid - 2012-01-04 09:41 +0000
                            Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2012-01-04 09:52 +0000
                          Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-04 18:14 +0000
                      Re: RiscPC problem Brian Carroll <bric-nospam@argonet.co.uk> - 2012-01-04 14:21 +0000
              Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2011-12-26 17:07 +0000
                Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2011-12-26 18:41 +0000
              Re: RiscPC problem Alan Dawes <alan.dawes@argonet.co.uk> - 2011-12-26 21:07 +0000
            Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-26 23:56 +0000
              Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2011-12-27 12:18 +0000
                Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-01 16:11 +0000
              Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-27 12:26 +0000
            Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-26 23:48 +0000
              Re: RiscPC problem Richard Porter <dontusethis@address.uk.invalid> - 2011-12-28 21:33 +0000
                Re: RiscPC problem Chris Evans <chris@cjemicros.co.uk> - 2011-12-30 10:55 +0000
                  Re: RiscPC problem charles <charles@charleshope.demon.co.uk> - 2011-12-30 12:20 +0000
                  Re: RiscPC problem "Dave Plowman (News)" <dave@davenoise.co.uk> - 2011-12-30 13:25 +0000
                Re: RiscPC problem Richard Torrens <Richard@Torrens.org.uk> - 2011-12-31 14:26 +0000
                  Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-01 16:09 +0000
                  Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2012-01-03 21:16 +0000
                  Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-04 18:22 +0000
                    Re: RiscPC problem Stuart <Spambin@argonet.co.uk> - 2012-01-04 20:34 +0000
                    Re: RiscPC problem Chris Johnson <chrisjohnson+news@spamcop.net> - 2012-01-04 20:38 +0000
                      Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-04 22:52 +0000
                    Re: RiscPC problem Philip Draper <Philip@borehamh.demon.co.uk> - 2012-01-05 09:56 +0000
                      Re: RiscPC problem Russell Hafter News <see.sig@walkingingermany.invalid> - 2012-01-05 11:21 +0000
    Re: RiscPC problem druck <news@druck.org.uk> - 2011-12-22 17:40 +0000
      Re: RiscPC problem druck <news@druck.org.uk> - 2011-12-22 17:41 +0000
      Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 00:28 +0000
        Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-23 07:49 +0100
      Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-23 07:44 +0100
        Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 11:36 +0000
        Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-23 12:01 +0000
    Re: RiscPC problem Chris Newman <cvjazz@waitrose.com> - 2011-12-22 20:07 +0000
      Re: RiscPC problem Rick Murray <heyrickmail-usenet@yahoo.co.uk> - 2011-12-23 08:08 +0100

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#3085 — RiscPC problem

I‘m posting this to comp.sys.acorn.misc & Archive on line.

Help! My trusty RiscPC (running Adjust 4.39) is suddenly not so trusty.

It malfunctioned, (see below) then, after I had left it for an hour in
disgust, it functioned again. It now seems to be back to normal. For future
reference, in case it happens again, can anyone shed light on what is
happening, please?

I got the error message in the circumstances outlined below.

Internal error: abort on instruction fetch at &01370D30

It appears to be always the same address.

The saga is as follows....

Boot sequence would not complete fully. Machine got nearly to the end of the
start-up process then the machine froze. There was no response from mouse or
keyboard so I could do nothing. All was locked. Organizer had loaded & the
first alarm was showing but Menu Bar, which precedes it in the boot order,
did not load so the Boot sequence seems to have jumped over that. I couldn‘t
do Alt/Break to close anything that might be offending because of the nil
response from the keyboard. The time on Organizer appeared correct so I
presumed the CMOS was OK.

I re-started the machine with Shift/Power on to by-pass the Boot sequence.
When I tried to access the hard drive to get at DiscKnight I got that pesky
error message ..

Internal error: abort on instruction fetch at &01370D30

I now had mouse & keyboard working so tried Alt/Break again. Lots of things
could be terminated but no joy in solving the problem.

I tried to load DiscKnight from the floppy drive but got the same results so
it doesn‘t look like a Hard Drive problem.

Any thoughts gratefully received.

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#3086

My reaction to this sort of thing is to removed and clean all the
connectors with a contact cleaner, and also the memory chips.

-- 
*Real men don't waste their hormones growing hair

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

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#3091

In article <5245a8db9fdave@davenoise.co.uk>,
   Dave Plowman (News) <dave@davenoise.co.uk> wrote:
> My reaction to this sort of thing is to removed and clean all the
> connectors with a contact cleaner, and also the memory chips.

Thanks Dave. I've actually just done a spring clean of the rscPC so that side
of things should be OK. I could have not seated something perhaps but I don't
think so. I was as careful as I could be.

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#3099

In article <5245d4f5b3cvjazz@waitrose.com>,
   Chris Newman <cvjazz@waitrose.com> wrote:
> In article <5245a8db9fdave@davenoise.co.uk>,
>    Dave Plowman (News) <dave@davenoise.co.uk> wrote:
> > My reaction to this sort of thing is to removed and clean all the
> > connectors with a contact cleaner, and also the memory chips.

> Thanks Dave. I've actually just done a spring clean of the rscPC so that
> side of things should be OK. I could have not seated something perhaps
> but I don't think so. I was as careful as I could be.

Hmm. If it has only just happened after your spring clean, I'd double
check. What did you use as contact cleaner? The memory would be the first
thing I'd look at - perhaps booting the machine with everything else (CD, 
HDs etc) unplugged. But the floppy left plugged.

-- 
*It is easier to get older than it is to get wiser.

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

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#3116

In article <5246095376dave@davenoise.co.uk>,
   Dave Plowman (News) <dave@davenoise.co.uk> wrote:

> Hmm. If it has only just happened after your spring clean, I'd double
> check. What did you use as contact cleaner? 

Indeed, hopefully just plain, simple, pure, Isopropyl Alcohol, anything
else is asking for future issues.

-- 
Stuart Winsor

Only plain text for emails
http://www.asciiribbon.org

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#3117

On 25/12/2011 20:51, Stuart wrote:

> Indeed, hopefully just plain, simple, pure, Isopropyl Alcohol, anything
> else is asking for future issues.

I experience quite a few... problems... in obtaining pure Isopropyl. 
Chemists don't seem to want to sell it due to some bogus anti-terrorism 
excuse, and it seems that many chemists are not smart in the field of 
consumer electronics and don't understand why magnetic heads and circuit 
contacts cannot be cleaned with regular "surgical spirit". I did, back 
in 2002, in Fleet, find a chemist who was a part time geek. Since then, 
especially with language difficulties of trying to explain a video 
recording head to a country girl in a little backwoods pharmacy, I've 
pretty much given up on getting the stuff...

Modern surgical spirit, it seems (certainly here in France) is quoted in 
strength of degrees (70°, 90°...). Unfortunately, this is also an 
indicator that there's a lot of other crap in there as well (paraffin, 
water...) so this isn't really suitable, although I have used it, 
begrudgingly, as a last resort, on stubbornly dirty disc heads. I don't 
think I'd *ever* use it on SIMM contacts.


Best wishes,

Rick.

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#3119

In article <4ef7c7be$0$5709$ba4acef3@reader.news.orange.fr>, Rick
Murray <heyrickmail-usenet@yahoo.co.uk> wrote:
> On 25/12/2011 20:51, Stuart wrote:

> > Indeed, hopefully just plain, simple, pure, Isopropyl Alcohol,
> > anything else is asking for future issues.

> I experience quite a few... problems... in obtaining pure Isopropyl.
> Chemists don't seem to want to sell it due to some bogus
> anti-terrorism excuse, and it seems that many chemists are not smart
> in the field of consumer electronics and don't understand why
> magnetic heads and circuit contacts cannot be cleaned with regular
> "surgical spirit". I did, back in 2002, in Fleet, find a chemist who
> was a part time geek. Since then, especially with language
> difficulties of trying to explain a video recording head to a
> country girl in a little backwoods pharmacy, I've pretty much given
> up on getting the stuff...

> Modern surgical spirit, it seems (certainly here in France) is quoted
> in strength of degrees (70°, 90°...). Unfortunately, this is also an
> indicator that there's a lot of other crap in there as well
> (paraffin, water...) so this isn't really suitable, although I have
> used it, begrudgingly, as a last resort, on stubbornly dirty disc
> heads. I don't think I'd *ever* use it on SIMM contacts.

In the UK it contains 2.5% castor oil. Should be quite good for
cleaning some things out.

-- 
Dev

Om Namah Shivaya | Om Devaya namaha

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#3122

In article <524791f75bspam-addy@no.spam.invalid>,
   Dev <spam-addy@no.spam.invalid> wrote:
> In article <4ef7c7be$0$5709$ba4acef3@reader.news.orange.fr>, Rick
> Murray <heyrickmail-usenet@yahoo.co.uk> wrote:

[Snip]

> > Modern surgical spirit, it seems (certainly here in France) is quoted
> > in strength of degrees (70°, 90°...). Unfortunately, this is also an
> > indicator that there's a lot of other crap in there as well
> > (paraffin, water...) so this isn't really suitable, although I have
> > used it, begrudgingly, as a last resort, on stubbornly dirty disc
> > heads. I don't think I'd *ever* use it on SIMM contacts.

> In the UK it contains 2.5% castor oil. Should be quite good for
> cleaning some things out.

I have this vague thought hanging somewhere in my head that SS in the UK
contained a percentage or two of Oil of Wintergreen.

Bangs head on desk to try and rattle loose the memory... Ouch!

Dave

-- 

Dave Triffid

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#3124

In message <5247c40e97dave@triffid.co.uk>
          Dave Symes <dave@triffid.co.uk> wrote:

>> In the UK it contains 2.5% castor oil. Should be quite good for
>> cleaning some things out.

> I have this vague thought hanging somewhere in my head that SS in the UK
> contained a percentage or two of Oil of Wintergreen.

> Bangs head on desk to try and rattle loose the memory... Ouch!

The British National Formulary states: Spirit, methyl salicylate 
0.5ml, diethyl phtalate 2%, castor oil 2.5%, in industrial methylated 
spirit.

Chris
-- 

Chris Shepheard writing as himself          
chris.shepheard@chrispics.co.uk
from far west Surrey                        www.chrispics.co.uk

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#3127

In article <d987c54752.chris.shepheard@shepheard.plus.com>,
   Chris Shepheard <chris.shepheard@chrispics.co.uk> wrote:
> In message <5247c40e97dave@triffid.co.uk>
>           Dave Symes <dave@triffid.co.uk> wrote:

> >> In the UK it contains 2.5% castor oil. Should be quite good for
> >> cleaning some things out.

> > I have this vague thought hanging somewhere in my head that SS in the
> > UK contained a percentage or two of Oil of Wintergreen.

> > Bangs head on desk to try and rattle loose the memory... Ouch!

> The British National Formulary states: Spirit, methyl salicylate 
> 0.5ml, diethyl phtalate 2%, castor oil 2.5%, in industrial methylated 
> spirit.

> Chris

Thanks, that'll save my bonce anymore punishment.

Dave

-- 

Dave Triffid

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#3191

In article <d987c54752.chris.shepheard@shepheard.plus.com>,
   Chris Shepheard <chris.shepheard@chrispics.co.uk> wrote:
> In message <5247c40e97dave@triffid.co.uk>
>           Dave Symes <dave@triffid.co.uk> wrote:

> >> In the UK it contains 2.5% castor oil. Should be quite good for
> >> cleaning some things out.

> > I have this vague thought hanging somewhere in my head that SS in the UK
> > contained a percentage or two of Oil of Wintergreen.

> > Bangs head on desk to try and rattle loose the memory... Ouch!

> The British National Formulary states: Spirit, methyl salicylate 
> 0.5ml, diethyl phtalate 2%, castor oil 2.5%, in industrial methylated 
> spirit.

That's OK re METHYLATED spirit. I had a look at B N Formulary site for
SURGICAL spirit but you have to register..... Anybody got a paper copy lying
around they can check?

I'm sure I also remember Surgical Spirit as having Oil of Wintergreen. I
wonder, does it stop the skin becoming too dry or is it to stop alkys
drinking the stuff?

Cheers,

-- 
Chris Newman

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#3194

In message <524bf039a7cvjazz@waitrose.com>
          Chris Newman <cvjazz@waitrose.com> wrote:

>> The British National Formulary states: Spirit, methyl salicylate
>> 0.5ml, diethyl phtalate 2%, castor oil 2.5%, in industrial methylated
>> spirit.

> That's OK re METHYLATED spirit. I had a look at B N Formulary site for
> SURGICAL spirit but you have to register..... Anybody got a paper copy lying
> around they can check?

That is from a 2006 copy of the BNF and is the formula for Surgical 
Spirit.

Chris
-- 

Chris Shepheard writing as himself          
chris.shepheard@chrispics.co.uk
from far west Surrey                        www.chrispics.co.uk

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#3197

In article <aa12f34b52.chris.shepheard@shepheard.plus.com>,
   Chris Shepheard <chris.shepheard@chrispics.co.uk> wrote:
> In message <524bf039a7cvjazz@waitrose.com>
>           Chris Newman <cvjazz@waitrose.com> wrote:

> >> The British National Formulary states: Spirit, methyl salicylate
> >> 0.5ml, diethyl phtalate 2%, castor oil 2.5%, in industrial methylated
> >> spirit.

> > That's OK re METHYLATED spirit. I had a look at B N Formulary site for
> > SURGICAL spirit but you have to register..... Anybody got a paper copy lying
> > around they can check?

> That is from a 2006 copy of the BNF and is the formula for Surgical 
> Spirit.

So Surgical Spirit contains industrial Methylated Spirit. Wow! Smells very
different.

Cheers,

-- 
Chris Newman

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#3200

In message <aa12f34b52.chris.shepheard@shepheard.plus.com>
          Chris Shepheard <chris.shepheard@chrispics.co.uk> wrote:

> In message <524bf039a7cvjazz@waitrose.com>
>           Chris Newman <cvjazz@waitrose.com> wrote:

>>> The British National Formulary states: Spirit, methyl salicylate
>>> 0.5ml, diethyl phtalate 2%, castor oil 2.5%, in industrial methylated
>>> spirit.

>> That's OK re METHYLATED spirit. I had a look at B N Formulary site for
>> SURGICAL spirit but you have to register..... Anybody got a paper copy lying
>> around they can check?

> That is from a 2006 copy of the BNF and is the formula for Surgical
> Spirit.

A chemical comment: I think you will find that methyl salicylate is 
the main component of oil of wintergreen. So everyone is right.

Neither castor oil nor diethyl phthalate (non-volatile insulators) 
seem terribly good things to get on to electrical contacts, and 
phthalate esters are softeners of plastics even if they don't actually 
dissolve them. I should stick to isopropyl alcohol, especially as it 
seems quite easy to get if you ask in the right places. (The 
explosives connection is almost certainly a garble - that's acetone.)

Philip.


-- 
Philip Draper

    Philip@borehamh.demon.co.uk

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#3201

In message <6138324c52.Philip@borehamh.demon.co.uk>
          Philip Draper <Philip@borehamh.demon.co.uk> wrote:

> In message <aa12f34b52.chris.shepheard@shepheard.plus.com>
>           Chris Shepheard <chris.shepheard@chrispics.co.uk> wrote:
> 
> > In message <524bf039a7cvjazz@waitrose.com>
> >           Chris Newman <cvjazz@waitrose.com> wrote:
> 
[snip]
> 
> Neither castor oil nor diethyl phthalate (non-volatile insulators) 
> seem terribly good things to get on to electrical contacts, and 
> phthalate esters are softeners of plastics even if they don't
> actually  dissolve them.

Is there a way of softening Plastic parts - ie small plastic clips that
hold cases etc together?

-- 
Colin Ferris Cornwall UK

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#3204

In message <5c6b354c52.cferris@cferris.freeuk.com>
          cferris@freeRemoveuk.com.invalid wrote:

> In message <6138324c52.Philip@borehamh.demon.co.uk>
>           Philip Draper <Philip@borehamh.demon.co.uk> wrote:

>> In message <aa12f34b52.chris.shepheard@shepheard.plus.com>
>>           Chris Shepheard <chris.shepheard@chrispics.co.uk> wrote:
>> 
>>> In message <524bf039a7cvjazz@waitrose.com>
>>>           Chris Newman <cvjazz@waitrose.com> wrote:
>> 
> [snip]
>> 
>> Neither castor oil nor diethyl phthalate (non-volatile insulators)
>> seem terribly good things to get on to electrical contacts, and
>> phthalate esters are softeners of plastics even if they don't
>> actually  dissolve them.

> Is there a way of softening Plastic parts - ie small plastic clips that
> hold cases etc together?

Gentle warmth seems simple and non-harmful. A hair-drier?

Philip.

-- 
Philip Draper

    Philip@borehamh.demon.co.uk

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#3217

In article <6138324c52.Philip@borehamh.demon.co.uk>, Philip
Draper <Philip@borehamh.demon.co.uk> wrote:
> In message
> <aa12f34b52.chris.shepheard@shepheard.plus.com> Chris
> Shepheard <chris.shepheard@chrispics.co.uk> wrote:

> > In message <524bf039a7cvjazz@waitrose.com> Chris Newman
> >           <cvjazz@waitrose.com> wrote:

> >>> The British National Formulary states: Spirit, methyl
> >>> salicylate 0.5ml, diethyl phtalate 2%, castor oil
> >>> 2.5%, in industrial methylated spirit.

> >> That's OK re METHYLATED spirit. I had a look at B N
> >> Formulary site for SURGICAL spirit but you have to
> >> register..... Anybody got a paper copy lying around
> >> they can check?

> > That is from a 2006 copy of the BNF and is the formula
> > for Surgical Spirit.

> A chemical comment: I think you will find that methyl
> salicylate is the main component of oil of wintergreen.
> So everyone is right.

Yes, 'Oil of Wintergreen' *is* methyl salicylate. Used to be
a common way of applying an analgesic to the skin, as it
slowly hydrolyses to methanol and salicylic acid, which is
the analgesic.

I cannot imagine that the taste of methyl salicylate in that
quantity would put people off, or even if they could taste
it through the isopropanol (or better, propan-2-ol).

Methylated spirit is formulated quite differently, being
made of ethanol (drinking, and therefore taxed, alcohol). It
contains small quantities of pyridine, which smells vile,
and probably tastes worse, and is highly toxic. But if you
have resorted to drinking meths, all that is probably beyond
you.

Just back from Belgium and Luxembourg - in both countries
pure ethanol (ie 96% ethaol, 5% water, which is as pure as
you can get by distillation) was freely available on
supermarket shelves, next door to the malt whisky.

> Neither castor oil nor diethyl phthalate (non-volatile
> insulators) seem terribly good things to get on to
> electrical contacts, and phthalate esters are softeners
> of plastics even if they don't actually dissolve them. I
> should stick to isopropyl alcohol, especially as it seems
> quite easy to get if you ask in the right places. (The
> explosives connection is almost certainly a garble -
> that's acetone.)

But you make acetone by oxidising propan-2-ol.

-- 
Russell
http://www.russell-hafter-holidays.co.uk
Russell Hafter Holidays         E-mail to enquiries at our domain
Need a hotel? <http://www.hrs.com/?client=en__blue&customerId=416873103>

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#3214

In article <524bf039a7cvjazz@waitrose.com>, Chris Newman
<cvjazz@waitrose.com> wrote:

[Snip]

> > The British National Formulary states: Spirit, methyl
> > salicylate 0.5ml, diethyl phtalate 2%, castor oil 2.5%, in
> > industrial methylated spirit.

> That's OK re METHYLATED spirit. I had a look at B N Formulary
> site for SURGICAL spirit but you have to register..... Anybody
> got a paper copy lying around they can check?

It may be OK as far as it goes but the list above omits methyl
alcohol, pyridine and a violet dye, which make it poisonous, give
the distinctive smell and the colour respectively of commercial
methylated spirit.


BTW, I had no difficulty buying isopropyl alcohol from Boots, but
I had to order it and the minimum  quantity was 500ml.

Brian.

-- 
______________________________________________________________

Brian Carroll, Ripon, North Yorkshire, UK  
______________________________________________________________

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#3121

In article <4ef7c7be$0$5709$ba4acef3@reader.news.orange.fr>,
   Rick Murray <heyrickmail-usenet@yahoo.co.uk> wrote:
> > Indeed, hopefully just plain, simple, pure, Isopropyl Alcohol, anything
> > else is asking for future issues.

> I experience quite a few... problems... in obtaining pure Isopropyl.

Should be freely available from any electronics supplier, people such as
Farnell, cpc etc.

-- 
Stuart Winsor

Only plain text for emails
http://www.asciiribbon.org

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#3123

In message <5247bbb6a9Spambin@argonet.co.uk>
          Stuart <Spambin@argonet.co.uk> wrote:

> In article <4ef7c7be$0$5709$ba4acef3@reader.news.orange.fr>,
>    Rick Murray <heyrickmail-usenet@yahoo.co.uk> wrote:
>>> Indeed, hopefully just plain, simple, pure, Isopropyl Alcohol, anything
>>> else is asking for future issues.

>> I experience quite a few... problems... in obtaining pure Isopropyl.

> Should be freely available from any electronics supplier, people such as
> Farnell, cpc etc.

Lots on offer on Amazon. Mostly 99.9%.

Philip.



-- 
Philip Draper

    Philip@borehamh.demon.co.uk

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