|
Model Engineering in UK - Model engineering, metal crafts in UK
|
|
|
|
|
Posted by Austin Shackles on March 25, 2008, 4:29 am
Please log in for more thread options
On or around Sun, 23 Mar 2008 20:15:39 -0000, "Steve"
>
>aluminum potassium sulphate, I can't remember what it was commonly used
>for.
>
I've an idea it's used in curing animal skins.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Travel The Galaxy! Meet Fascinating Life Forms...
------------------------------------------------
>> http://www.schlockmercenary.com/ << ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!
|
|
Posted by David Littlewood on March 23, 2008, 6:58 pm
Please log in for more thread options
writes
>
>> Steve wrote:
>>>
>>> Not sure how to acquire smal quantities of Nitric acid locally either.
>>> Our local chemist is nervous about selling me 500ml bottles of IsoPropyl
>>> Alcohol, so asking for Nitric will probably give him a heart attack.
>>
>> Should be easy enough then, isopropyl alcohol can be used to make Sarin
>> (the nerve gas), but the worst you can make with nitric acid is
>> nitroglycerine.
>>
>> Of course a "Chemist" may not know that ...
>>
>>
>> If you are anywhere near Trowbridge Wilts I can let you have some nitric
>> acid .. but I can't post it.
>
>The yanks reckon that a solution of alum is the dog's danglies for
>dissolving steel out of aluminium. Quite what alum is or where you'd get it
>from I have no idea.
Aluminium potassium sulphate, K2SO4.Al2(SO4)3.12H2O. Fairly common
chemical. Only advantage I can think of is that it's less likely to eat
your flesh.
[Actually, for the terminally curious, there is a whole family of
"alums" of general formula K2SO4.M2(SO4)3.xH2O, where M is a trivalent
metal ion. Fe3+ and Cr3+ are probably the best known, termed iron alum
and chrome alum. But the aluminium version is by far the commonest, and
usually just referred to as "alum". Makes sense, as the others don't
actually have any aluminium in them....]
They are easy to grow into nice big pretty crystals, especially the Cr
version, which is a nice red colour. Getting a bit OT here though.
David
--
David Littlewood
|
|
Posted by Peter Fairbrother on March 23, 2008, 8:26 pm
Please log in for more thread options Dave Baker wrote:
>> Steve wrote:
>>> Not sure how to acquire smal quantities of Nitric acid locally either.
>>> Our local chemist is nervous about selling me 500ml bottles of IsoPropyl
>>> Alcohol, so asking for Nitric will probably give him a heart attack.
>> Should be easy enough then, isopropyl alcohol can be used to make Sarin
>> (the nerve gas), but the worst you can make with nitric acid is
>> nitroglycerine.
>>
>> Of course a "Chemist" may not know that ...
>>
>>
>> If you are anywhere near Trowbridge Wilts I can let you have some nitric
>> acid .. but I can't post it.
>
> The yanks reckon that a solution of alum is the dog's danglies for
> dissolving steel out of aluminium. Quite what alum is or where you'd get it
> from I have no idea.
http://cgi.ebay.co.uk/ALUM-(ALUMINIUM-POTASSIUM-SULPHATE)-250g_W0QQitemZ160221056048QQcmdZViewItem
£3.99 plus £2.25 postage for 250 g.
Used for dyeing, as a mordant, and so on.
-- Peter Fairbrother
|
|
Posted by Austin Shackles on March 25, 2008, 4:30 am
Please log in for more thread options On or around Mon, 24 Mar 2008 00:26:28 +0000, Peter Fairbrother
>Dave Baker wrote:
>>> Steve wrote:
>>>> Not sure how to acquire smal quantities of Nitric acid locally either.
>>>> Our local chemist is nervous about selling me 500ml bottles of IsoPropyl
>>>> Alcohol, so asking for Nitric will probably give him a heart attack.
>>> Should be easy enough then, isopropyl alcohol can be used to make Sarin
>>> (the nerve gas), but the worst you can make with nitric acid is
>>> nitroglycerine.
>>>
>>> Of course a "Chemist" may not know that ...
>>>
>>>
>>> If you are anywhere near Trowbridge Wilts I can let you have some nitric
>>> acid .. but I can't post it.
>>
>> The yanks reckon that a solution of alum is the dog's danglies for
>> dissolving steel out of aluminium. Quite what alum is or where you'd get it
>> from I have no idea.
>
>http://cgi.ebay.co.uk/ALUM-(ALUMINIUM-POTASSIUM-SULPHATE)-250g_W0QQitemZ160221056048QQcmdZViewItem
>
>£3.99 plus £2.25 postage for 250 g.
>
>Used for dyeing, as a mordant, and so on.
and for when you cut yourself shaving.
--
Austin Shackles. www.ddol-las.net my opinions are just that
Travel The Galaxy! Meet Fascinating Life Forms...
------------------------------------------------
>> http://www.schlockmercenary.com/ << ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!
|
|
Posted by Donald on March 24, 2008, 10:38 am
Please log in for more thread options
> > Steve wrote:
> >>
> >> Not sure how to acquire smal quantities of Nitric acid locally either.
> >> Our local chemist is nervous about selling me 500ml bottles of IsoPropyl
> >> Alcohol, so asking for Nitric will probably give him a heart attack.
> >
> > Should be easy enough then, isopropyl alcohol can be used to make Sarin
> > (the nerve gas), but the worst you can make with nitric acid is
> > nitroglycerine.
> >
> > Of course a "Chemist" may not know that ...
> >
> >
> > If you are anywhere near Trowbridge Wilts I can let you have some nitric
> > acid .. but I can't post it.
> The yanks reckon that a solution of alum is the dog's danglies for
> dissolving steel out of aluminium. Quite what alum is or where you'd get it
> from I have no idea.
I have some alum somewhere. Take a deer or sheep skin, spread it out and
apply a solution of alum and it will cure it to make you a rug. Don't
worry about the animal rights people, sheep are bred to give you lamb and
the deer have to be culled. Venison is a fat free supply of protein.
Donald, South Uist
|
| Similar Threads | Posted | | Drill press for normal drill | September 28, 2006, 10:46 am |
| Removing a broken tap | June 8, 2008, 5:59 am |
| Repair of a broken camera lens | July 20, 2008, 7:14 am |
| Meddings drill repair | January 20, 2008, 10:28 am |
| Meddings Pillar Drill | February 24, 2008, 5:51 am |
| Left Hand Drill? | April 6, 2008, 3:37 pm |
| Drill Stands wanted | September 28, 2006, 7:49 pm |
| Sharpening carbide drill bit | May 11, 2008, 7:43 am |
| Slot drill / End mill with radiused tip | March 31, 2008, 7:58 am |
| Pillar Drill Vice Question | September 10, 2006, 6:01 pm |
|
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
>aluminum potassium sulphate, I can't remember what it was commonly used
>for.
>