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Groups > comp.sys.acorn.misc > #3085 > unrolled thread
| Started by | Chris Newman <cvjazz@waitrose.com> |
|---|---|
| First post | 2011-12-22 15:46 +0000 |
| Last post | 2011-12-23 08:08 +0100 |
| Articles | 20 on this page of 48 — 18 participants |
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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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| From | Alan Dawes <alan.dawes@argonet.co.uk> |
|---|---|
| Date | 2011-12-26 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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| From | Chris Newman <cvjazz@waitrose.com> |
|---|---|
| Date | 2011-12-26 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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| From | Stuart <Spambin@argonet.co.uk> |
|---|---|
| Date | 2011-12-27 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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| From | Chris Newman <cvjazz@waitrose.com> |
|---|---|
| Date | 2012-01-01 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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| From | "Dave Plowman (News)" <dave@davenoise.co.uk> |
|---|---|
| Date | 2011-12-27 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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| From | "Dave Plowman (News)" <dave@davenoise.co.uk> |
|---|---|
| Date | 2011-12-26 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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| From | Richard Porter <dontusethis@address.uk.invalid> |
|---|---|
| Date | 2011-12-28 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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| From | Chris Evans <chris@cjemicros.co.uk> |
|---|---|
| Date | 2011-12-30 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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| From | charles <charles@charleshope.demon.co.uk> |
|---|---|
| Date | 2011-12-30 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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| From | "Dave Plowman (News)" <dave@davenoise.co.uk> |
|---|---|
| Date | 2011-12-30 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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| From | Richard Torrens <Richard@Torrens.org.uk> |
|---|---|
| Date | 2011-12-31 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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| From | Chris Newman <cvjazz@waitrose.com> |
|---|---|
| Date | 2012-01-01 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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| From | Chris Newman <cvjazz@waitrose.com> |
|---|---|
| Date | 2012-01-03 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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| From | Russell Hafter News <see.sig@walkingingermany.invalid> |
|---|---|
| Date | 2012-01-04 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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| From | Stuart <Spambin@argonet.co.uk> |
|---|---|
| Date | 2012-01-04 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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| From | Chris Johnson <chrisjohnson+news@spamcop.net> |
|---|---|
| Date | 2012-01-04 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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| From | Russell Hafter News <see.sig@walkingingermany.invalid> |
|---|---|
| Date | 2012-01-04 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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| From | Philip Draper <Philip@borehamh.demon.co.uk> |
|---|---|
| Date | 2012-01-05 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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| From | Russell Hafter News <see.sig@walkingingermany.invalid> |
|---|---|
| Date | 2012-01-05 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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| From | druck <news@druck.org.uk> |
|---|---|
| Date | 2011-12-22 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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