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Groups > comp.sys.acorn.misc > #3085 > unrolled thread

RiscPC problem

Started byChris Newman <cvjazz@waitrose.com>
First post2011-12-22 15:46 +0000
Last post2011-12-23 08:08 +0100
Articles 20 on this page of 48 — 18 participants

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Contents

  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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#3126

FromAlan Dawes <alan.dawes@argonet.co.uk>
Date2011-12-26 21:07 +0000
Message-ID<5247d1b155alan.dawes@argonet.co.uk>
In reply to#3117
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.
For at least the last 50 years the chemical name for isopropyl alcohol has
been propan-2-ol which I assume is the name that pharmacists will find it
listed under.

Alan

-- 
alan.dawes@argonet.co.uk
alan.dawes@riscos.org
Using an Acorn RiscPC

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#3129

FromChris Newman <cvjazz@waitrose.com>
Date2011-12-26 23:56 +0000
Message-ID<5247e13c8ccvjazz@waitrose.com>
In reply to#3116
In article <524746f56bSpambin@argonet.co.uk>,
   Stuart <Spambin@argonet.co.uk> wrote:
> 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.

So hard to get round here. My pharmacist can't get it & the local tattoo
parlour where they used to use it for cleaning the skin prior to putting the
needles in says it is banned.
For cleaning the RiscPC I used electrical Contact Cleaner from Maplins.

-- 
Chris Newman

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#3134

FromStuart <Spambin@argonet.co.uk>
Date2011-12-27 12:18 +0000
Message-ID<5248251c04Spambin@argonet.co.uk>
In reply to#3129
In article <5247e13c8ccvjazz@waitrose.com>,
   Chris Newman <cvjazz@waitrose.com> wrote:
> > Indeed, hopefully just plain, simple, pure, Isopropyl Alcohol, anything
> > else is asking for future issues.

> So hard to get round here. My pharmacist can't get it & the local tattoo
> parlour where they used to use it for cleaning the skin prior to putting
> the needles in says it is banned. For cleaning the RiscPC I used
> electrical Contact Cleaner from Maplins.

http://www.maplin.co.uk/isopropyl-alcohol-28994

-- 
Stuart Winsor

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


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#3186

FromChris Newman <cvjazz@waitrose.com>
Date2012-01-01 16:11 +0000
Message-ID<524acd9cb1cvjazz@waitrose.com>
In reply to#3134
In article <5248251c04Spambin@argonet.co.uk>,
   Stuart <Spambin@argonet.co.uk> wrote:
> In article <5247e13c8ccvjazz@waitrose.com>,
>    Chris Newman <cvjazz@waitrose.com> wrote:
> > > Indeed, hopefully just plain, simple, pure, Isopropyl Alcohol, anything
> > > else is asking for future issues.

> > So hard to get round here. My pharmacist can't get it & the local tattoo
> > parlour where they used to use it for cleaning the skin prior to putting
> > the needles in says it is banned. For cleaning the RiscPC I used
> > electrical Contact Cleaner from Maplins.

> http://www.maplin.co.uk/isopropyl-alcohol-28994

Well done that man. I followed up this link & discovered my local Maplins at
Portsmouth had it on the shelf. I am now the proud owner of same.(That's the
alcohol, not Maplins).

Cheers.

-- 
Chris Newman

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#3135

From"Dave Plowman (News)" <dave@davenoise.co.uk>
Date2011-12-27 12:26 +0000
Message-ID<524825d139dave@davenoise.co.uk>
In reply to#3129
In article <5247e13c8ccvjazz@waitrose.com>,
   Chris Newman <cvjazz@waitrose.com> wrote:
> So hard to get round here. My pharmacist can't get it & the local tattoo
> parlour where they used to use it for cleaning the skin prior to putting
> the needles in says it is banned.

Your pharmacist is telling porkies. He just doesn't want to sell it to
you, for whatever reason. Dunno about tattoo parlours. 

It's quite easy to buy, either from Ebay or electronics suppliers.

-- 
*Do infants enjoy infancy as much as adults enjoy adultery?

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

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#3130

From"Dave Plowman (News)" <dave@davenoise.co.uk>
Date2011-12-26 23:48 +0000
Message-ID<5247e06e5cdave@davenoise.co.uk>
In reply to#3116
In article <524746f56bSpambin@argonet.co.uk>,
   Stuart <Spambin@argonet.co.uk> wrote:
> 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.

I generally use AF Spray. Never known it cause problems with plastics, etc.

-- 
*Forget about World Peace...Visualize using your turn signal.

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

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#3144

FromRichard Porter <dontusethis@address.uk.invalid>
Date2011-12-28 21:33 +0000
Message-ID<70c3db4852.news@user.minijem.plus.com>
In reply to#3130
The date being 26 Dec 2011, "Dave Plowman (News)" 
<dave@davenoise.co.uk> decided to write:

> In article <524746f56bSpambin@argonet.co.uk>,
>    Stuart <Spambin@argonet.co.uk> wrote:
>> 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.

> I generally use AF Spray. Never known it cause problems with plastics, etc.

Same here. It's inert and evaporates without leaving any traces so is 
excellent for cleaning tape heads, dirty faders etc.

-- 
Richard Porter
rich@ / www. richardporter.me.uk
"You can't have Windows without pains."

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#3158

FromChris Evans <chris@cjemicros.co.uk>
Date2011-12-30 10:55 +0000
Message-ID<ant301036345pErr@client.cjemicros.co.uk>
In reply to#3144
In article <70c3db4852.news@user.minijem.plus.com>, Richard Porter
<URL:mailto:dontusethis@address.uk.invalid> wrote:
> The date being 26 Dec 2011, "Dave Plowman (News)" 
> <dave@davenoise.co.uk> decided to write:
> 
> > In article <524746f56bSpambin@argonet.co.uk>,
> >    Stuart <Spambin@argonet.co.uk> wrote:
> >> 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.
> 
> > I generally use AF Spray. Never known it cause problems with plastics, etc.

AF = Anti Fogging or Anti Freeze or ?


Chris Evans

-- 
CJE Micro's / 4D                'RISC OS Specialists'
Telephone: 01903 523222             Fax: 01903 523679
chris@cjemicros.co.uk     http://www.cjemicros.co.uk/
78 Brighton Road, Worthing, West Sussex,     BN11 2EN
The most beautiful thing anyone can wear, is a smile!

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#3160

Fromcharles <charles@charleshope.demon.co.uk>
Date2011-12-30 12:20 +0000
Message-ID<5249b0cf73charles@charleshope.demon.co.uk>
In reply to#3158
In article <ant301036345pErr@client.cjemicros.co.uk>, Chris Evans
<chris@cjemicros.co.uk> wrote:
> In article <70c3db4852.news@user.minijem.plus.com>, Richard Porter
> <URL:mailto:dontusethis@address.uk.invalid> wrote:
> > The date being 26 Dec 2011, "Dave Plowman (News)"
> > <dave@davenoise.co.uk> decided to write:
> > 
> > > In article <524746f56bSpambin@argonet.co.uk>, Stuart
> > >    <Spambin@argonet.co.uk> wrote:
> > >> 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.
> > 
> > > I generally use AF Spray. Never known it cause problems with
> > > plastics, etc.

> AF = Anti Fogging or Anti Freeze or ?

AF International being a manufacturer of this sort of product - also screen
cleaners, etc.


> Chris Evans

-- 
From KT24 

Using a RISC OS computer running v5.16 

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#3161

From"Dave Plowman (News)" <dave@davenoise.co.uk>
Date2011-12-30 13:25 +0000
Message-ID<5249b6bc4ddave@davenoise.co.uk>
In reply to#3158
In article <ant301036345pErr@client.cjemicros.co.uk>,
   Chris Evans <chris@cjemicros.co.uk> wrote:
> > > I generally use AF Spray. Never known it cause problems with plastics, etc.

> AF = Anti Fogging or Anti Freeze or ?

I'm surprised you haven't heard of it. AF Spray is near universal in
broadcast for anything which needs a solvent cleaner. Even back to tape
head days. And I can assure you it is safe to use on an RPC for cleaning
anything. 

Perhaps since you have everything in stock you should add it? ;-)

-- 
*Proofread carefully to see if you any words out or mispeld something *

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

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#3175

FromRichard Torrens <Richard@Torrens.org.uk>
Date2011-12-31 14:26 +0000
Message-ID<524a402cddRichard@Torrens.org.uk>
In reply to#3144
In article <70c3db4852.news@user.minijem.plus.com>,
   Richard Porter <dontusethis@address.uk.invalid> wrote:
> > I generally use AF Spray. Never known it cause problems with plastics, etc.

> Same here. It's inert and evaporates without leaving any traces so is 
> excellent for cleaning tape heads, dirty faders etc.

http://www1.af-net.com/msds/001/001AFS200.pdf
isa pdf safety data sheet on AF spray.

It's isopropyl with a pentane propellant.

I've always used acetone for such cleaning. I's safe with most plastics.

-- 
Richard Torrens  - Richard@Torrens.org.uk

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#3185

FromChris Newman <cvjazz@waitrose.com>
Date2012-01-01 16:09 +0000
Message-ID<524acd780acvjazz@waitrose.com>
In reply to#3175
In article <524a402cddRichard@Torrens.org.uk>,
   Richard Torrens <Richard@Torrens.org.uk> wrote:
> In article <70c3db4852.news@user.minijem.plus.com>,
>    Richard Porter <dontusethis@address.uk.invalid> wrote:
> > > I generally use AF Spray. Never known it cause problems with plastics, etc.

> > Same here. It's inert and evaporates without leaving any traces so is 
> > excellent for cleaning tape heads, dirty faders etc.

> http://www1.af-net.com/msds/001/001AFS200.pdf
> isa pdf safety data sheet on AF spray.

> It's isopropyl with a pentane propellant.

> I've always used acetone for such cleaning. I's safe with most plastics.

I often use Naptha which comes as brake & clutch cleaner. It is also inert
with the majority of plastics. It can leave a very slight white residue so I
finsh off with Maplins electrical cleaner. Now thanks to Stuart Winsor, I've
tracked down some Isopropyl Alcohol at our local Maplins so will use that in
future.

Regards,

-- 
Chris Newman

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#3192

FromChris Newman <cvjazz@waitrose.com>
Date2012-01-03 21:16 +0000
Message-ID<524bf13b4fcvjazz@waitrose.com>
In reply to#3175
In article <524a402cddRichard@Torrens.org.uk>,
   Richard Torrens <Richard@Torrens.org.uk> wrote:
> In article <70c3db4852.news@user.minijem.plus.com>,
>    Richard Porter <dontusethis@address.uk.invalid> wrote:
> > > I generally use AF Spray. Never known it cause problems with plastics, etc.

> > Same here. It's inert and evaporates without leaving any traces so is 
> > excellent for cleaning tape heads, dirty faders etc.

> http://www1.af-net.com/msds/001/001AFS200.pdf
> isa pdf safety data sheet on AF spray.

> It's isopropyl with a pentane propellant.

From maplins, off the shelf, I got a spray canister (400ml) of Isopropyl
Alcohol. Made by Servisol in Bridgewater. No mention on the can of a carrier.

Recovered from the festive season,
Cheers,

-- 
Chris Newman

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#3218

FromRussell Hafter News <see.sig@walkingingermany.invalid>
Date2012-01-04 18:22 +0000
Message-ID<524c65299esee.sig@walkingingermany.invalid>
In reply to#3175
In article <524a402cddRichard@Torrens.org.uk>, Richard
Torrens <Richard@Torrens.org.uk> wrote:
> In article <70c3db4852.news@user.minijem.plus.com>,
> Richard Porter <dontusethis@address.uk.invalid> wrote:

> > > I generally use AF Spray. Never known it cause
> > > problems with plastics, etc.

> > Same here. It's inert and evaporates without leaving
> > any traces so is excellent for cleaning tape heads,
> > dirty faders etc.

> http://www1.af-net.com/msds/001/001AFS200.pdf isa pdf
> safety data sheet on AF spray.

> It's isopropyl with a pentane propellant.

> I've always used acetone for such cleaning. I's safe with
> most plastics.

Then you have been very lucky!

I used to use acetone for dissolving certain plastics, and
in my PhD and postdoc days it was what we washed all our
glassware in as a first choice. It would, in time, remove
around 80% of the tarry crud I had left in the bottom of
flasks. The remaining 20% needed chromic acid.

I hate to think what the HSE would have thought of our
standard practice of a 5l beaker being filled with 2.5l of
sulphuric acid, pptassium dichromate being added and the
beaker just parked at the back of the bench so that the
cruddy flasks could be dropped in.

-- 
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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#3221

FromStuart <Spambin@argonet.co.uk>
Date2012-01-04 20:34 +0000
Message-ID<524c713818Spambin@argonet.co.uk>
In reply to#3218
In article <524c65299esee.sig@walkingingermany.invalid>,
   Russell Hafter News <see.sig@walkingingermany.invalid> wrote:
> I hate to think what the HSE would have thought of our
> standard practice of a 5l beaker being filled with 2.5l of
> sulphuric acid, pptassium dichromate being added and the
> beaker just parked at the back of the bench so that the
> cruddy flasks could be dropped in.

Ours used to live at the back of the fume cupboard.

-- 
Stuart Winsor

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


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#3223

FromChris Johnson <chrisjohnson+news@spamcop.net>
Date2012-01-04 20:38 +0000
Message-ID<524c719d87chrisjohnson+news@spamcop.net>
In reply to#3218
In article <524c65299esee.sig@walkingingermany.invalid>,
   Russell Hafter News <see.sig@walkingingermany.invalid> wrote:
> I hate to think what the HSE would have thought of our
> standard practice of a 5l beaker being filled with 2.5l of
> sulphuric acid, pptassium dichromate being added and the
> beaker just parked at the back of the bench so that the
> cruddy flasks could be dropped in.

That's fairly small scale! In our (phys chem gas reactions) research
lab we had two large aquarium tanks (the all in one piece type,
obviously, getting on for 3' x 2' x 2') to clean ground glass greased
taps from glass vacuum lines before another round of glass blowing!

-- 
Chris Johnson

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#3227

FromRussell Hafter News <see.sig@walkingingermany.invalid>
Date2012-01-04 22:52 +0000
Message-ID<524c7dd5d1see.sig@walkingingermany.invalid>
In reply to#3223
In article <524c719d87chrisjohnson+news@spamcop.net>, Chris
Johnson <chrisjohnson+news@spamcop.net> wrote:
> In article <524c65299esee.sig@walkingingermany.invalid>,
>    Russell Hafter News <see.sig@walkingingermany.invalid>
> wrote:
> > I hate to think what the HSE would have thought of our
> > standard practice of a 5l beaker being filled with 2.5l
> > of sulphuric acid, pptassium dichromate being added and
> > the beaker just parked at the back of the bench so that
> > the cruddy flasks could be dropped in.

> That's fairly small scale! In our (phys chem gas
> reactions) research lab we had two large aquarium tanks
> (the all in one piece type, obviously, getting on for 3'
> x 2' x 2') to clean ground glass greased taps from glass
> vacuum lines before another round of glass blowing!

It was easily the largest piece of glassware I ever used. I
was often lucky if I had as much as 100mg of something to
work with and the flasks used were correspondingly small.
And if I did have that much, I certainly would not use all
of it at once!

-- 
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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#3228

FromPhilip Draper <Philip@borehamh.demon.co.uk>
Date2012-01-05 09:56 +0000
Message-ID<66a5ba4c52.Philip@borehamh.demon.co.uk>
In reply to#3218
In message <524c65299esee.sig@walkingingermany.invalid>
          Russell Hafter News <see.sig@walkingingermany.invalid> 
wrote:

> In article <524a402cddRichard@Torrens.org.uk>, Richard
> Torrens <Richard@Torrens.org.uk> wrote:
>> In article <70c3db4852.news@user.minijem.plus.com>,
>> Richard Porter <dontusethis@address.uk.invalid> wrote:

>>>> I generally use AF Spray. Never known it cause
>>>> problems with plastics, etc.

>>> Same here. It's inert and evaporates without leaving
>>> any traces so is excellent for cleaning tape heads,
>>> dirty faders etc.

>> http://www1.af-net.com/msds/001/001AFS200.pdf isa pdf
>> safety data sheet on AF spray.

>> It's isopropyl with a pentane propellant.

>> I've always used acetone for such cleaning. I's safe with
>> most plastics.

> Then you have been very lucky!

> I used to use acetone for dissolving certain plastics, and
> in my PhD and postdoc days it was what we washed all our
> glassware in as a first choice. It would, in time, remove
> around 80% of the tarry crud I had left in the bottom of
> flasks. The remaining 20% needed chromic acid.

> I hate to think what the HSE would have thought of our
> standard practice of a 5l beaker being filled with 2.5l of
> sulphuric acid, pptassium dichromate being added and the
> beaker just parked at the back of the bench so that the
> cruddy flasks could be dropped in.

People who used 'chromic acid' always ended up with beautiful lacy lab 
coats. But that oxidation state of chromium an established carcinogen 
(apart from being very corrosive) and is not encouraged - to say the 
least.

Re your other message: while you can indeed oxidise IPA to acetone, 
recovering the product would not be straightforward would it? Not the 
sort of thing you can do in the bath, which is (if I remember 
correctly) where the people who blew up the Tube made their explosive.

Re surgical spirit: I had assumed that its main use was as a skin rub, 
so the addition of the salicylate (which being lipid-soluble 
penetrates the skin easily) and (castor) oil was probably to improve 
its therapeutic properties.

There is (used to be) industrial methylated spirit, which was ethanol 
denatured with methanol ('wood naphtha') but without the pyridine or 
dye. We were supposed to use that at work but I always preferred pure 
alcohol, which is excellent (as a cleaning and drying solvent I 
emphasize) and very clean now they don't use benzene to prepare it.

Philip.

Philip.



-- 
Philip Draper

    Philip@borehamh.demon.co.uk

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#3231

FromRussell Hafter News <see.sig@walkingingermany.invalid>
Date2012-01-05 11:21 +0000
Message-ID<524cc26ad7see.sig@walkingingermany.invalid>
In reply to#3228
In article <66a5ba4c52.Philip@borehamh.demon.co.uk>, Philip
Draper <Philip@borehamh.demon.co.uk> wrote:

> In message <524c65299esee.sig@walkingingermany.invalid>
>           Russell Hafter News
> <see.sig@walkingingermany.invalid> wrote:

> > I hate to think what the HSE would have thought of our
> > standard practice of a 5l beaker being filled with 2.5l
> > of sulphuric acid, pptassium dichromate being added and
> > the beaker just parked at the back of the bench so that
> > the cruddy flasks could be dropped in.

> People who used 'chromic acid' always ended up with
> beautiful lacy lab coats.

Nobody I knew or worked with, either at Oxford, Stirling or
the University of Vermont wore lab coats. But yes, my jeans
did quickly gain a *few* holes. But usually not a major
problem if you were careful.

> But that oxidation state of chromium an established
> carcinogen (apart from being very corrosive) and is not
> encouraged - to say the least.

That is the case now, but certainly not then. Ammonium
dichromate volcanos were a regular part of childhood
Christmases (bought from toy shops), as well as part of my
teacher training in 1972 and pretty much part of the
curriculum in the early 1980s.

Then more or less overnight it was decreed carcinogenic.

> Re your other message: while you can indeed oxidise IPA
> to acetone, recovering the product would not be
> straightforward would it? Not the sort of thing you can
> do in the bath, which is (if I remember correctly) where
> the people who blew up the Tube made their explosive.

That is what we were told, but I am not at all sure that
what we were told was the full story, by any means. A lot of
the discussions about the hydrogen peroxide used did not
make sense to me, and some of the syntheses found by a quick
google are pretty vague on that point.

-- 
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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#3087

Fromdruck <news@druck.org.uk>
Date2011-12-22 17:40 +0000
Message-ID<jcvq39$50c$1@dont-email.me>
In reply to#3085
On 22/12/2011 15:46, Chris Newman wrote:
> Internal error: abort on instruction fetch at&01370D30

Get where from http://www.armclub.org.uk/free/ press F12 and type:-

   where

This will tell you if that error is a module, and which one it is.

---druck

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