A garden pick up tool I have is made from Al. tube. Of late it has started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

On 23/09/2020 15:45, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?


I have hand tools that do the same, I wonder if it's harmful?

On 23/09/2020 15:45, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

Wrap it in gaffer tape.

On 23/09/2020 15:45:19, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

There are exposure limits for aluminium powder in air but not aware of
any health issues regarding skin contact, suggesting there isn't a known
issue.

The closest I got was this article:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/
Look for the first instance of skin, "Aluminium penetration of the skin
is very shallow" though I assume they must mean the oxide.

A general rule is that you should limit exposure to a chemical so
perhaps if there is any concern then wear gloves. Probably not a bad
thing to do in any case.

On Wednesday, 23 September 2020 15:45:24 UTC+1, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

Slap on a bit of lacquer/varnish/similar?

On the pick up tool not your hands.

In message , Jimk
writes
Fredxx Wrote in message:
On 23/09/2020 15:45:19, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

There are exposure limits for aluminium powder in air but not aware of
any health issues regarding skin contact, suggesting there isn't a known
issue.

The closest I got was this article:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/
Look for the first instance of skin, "Aluminium penetration of the skin
is very shallow" though I assume they must mean the oxide.

A general rule is that you should limit exposure to a chemical so
perhaps if there is any concern then wear gloves. Probably not a bad
thing to do in any case.





Was the ali saucepan poison theory debunked?

They clean up well if you cook anything involving Vinegar:-)

--
Tim Lamb

On 23/09/2020 16:01, R D S wrote:
On 23/09/2020 15:45, fred wrote:
AÂ* garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?


I have hand tools that do the same, I wonder if it's harmful?

Not really. "Aluminium oxide is a common ingredient in sunscreen and is
sometimes also present in cosmetics such as blush, lipstick, and nail
polish." (wiki)

There you go, cheap sunscreen on your hands


--
"First, find out who are the people you can not criticise. They are your
oppressors."
- George Orwell

On 23/09/2020 18:02, Tim Lamb wrote:
In message , Jimk
writes
Fredxx Wrote in message:
On 23/09/2020 15:45:19, fred wrote:
AÂ* garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

There are exposure limits for aluminium powder in air but not aware of
any health issues regarding skin contact, suggesting there isn't a known
issue.

The closest I got was this article:
Â*Â* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/
Look for the first instance of skin, "Aluminium penetration of the skin
is very shallow" though I assume they must mean the oxide.

A general rule is that you should limit exposure to a chemical so
perhaps if there is any concern then wear gloves. Probably not a bad
thing to do in any case.





Was the ali saucepan poison theory debunked?

They clean up well if you cook anything involving Vinegar:-)

And that was the issue. clearly aluminium oxalate was being produced and
ingested.

The question was if that was a Good Thing. To be on the safe side
aluminum saucepans were phased out

--
Socialism is the philosophy of failure, the creed of ignorance and the
gospel of envy.

Its inherent virtue is the equal sharing of misery.

Winston Churchill

On 23/09/2020 18:02, Tim Lamb wrote:
In message , Jimk
writes
Fredxx Wrote in message:
On 23/09/2020 15:45:19, fred wrote:
AÂ* garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

There are exposure limits for aluminium powder in air but not aware of
any health issues regarding skin contact, suggesting there isn't a known
issue.

The closest I got was this article:
Â*Â* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/
Look for the first instance of skin, "Aluminium penetration of the skin
is very shallow" though I assume they must mean the oxide.

A general rule is that you should limit exposure to a chemical so
perhaps if there is any concern then wear gloves. Probably not a bad
thing to do in any case.





Was the ali saucepan poison theory debunked?

They clean up well if you cook anything involving Vinegar:-)

Don't cook rhubarb in aluminium pots. Also cleans them up

On 23/09/2020 18:34, The Natural Philosopher wrote:
On 23/09/2020 18:02, Tim Lamb wrote:
In message , Jimk
writes
Fredxx Wrote in message:
On 23/09/2020 15:45:19, fred wrote:
AÂ* garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

There are exposure limits for aluminium powder in air but not aware of
any health issues regarding skin contact, suggesting there isn't a
known
issue.

The closest I got was this article:
Â*Â* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/
Look for the first instance of skin, "Aluminium penetration of the skin
is very shallow" though I assume they must mean the oxide.

A general rule is that you should limit exposure to a chemical so
perhaps if there is any concern then wear gloves. Probably not a bad
thing to do in any case.





Was the ali saucepan poison theory debunked?

They clean up well if you cook anything involving Vinegar:-)

And that was the issue. clearly aluminium oxalate was being produced and
ingested.

The question was if that was a Good Thing. To be on the safe side
aluminum saucepans were phased out


An awful lot of aluminium must have been ingested by huge numbers of
people over the decades before they did.

On 23/09/2020 19:29, Chris Hogg wrote:
On Wed, 23 Sep 2020 18:32:45 +0100, The Natural Philosopher
wrote:

On 23/09/2020 16:01, R D S wrote:
On 23/09/2020 15:45, fred wrote:
AÂ* garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?


I have hand tools that do the same, I wonder if it's harmful?

Not really. "Aluminium oxide is a common ingredient in sunscreen and is
sometimes also present in cosmetics such as blush, lipstick, and nail
polish." (wiki)

There you go, cheap sunscreen on your hands

Hmm...yebbut, why is it black on Fred's hands. I have a related
experience - the telescopic ladder into my loft is aluminium, and
where the sections slide over each other, it rubs off black. Pure
Al2O3 is white. Perhaps in both cases they're an aluminium alloy,
duralumin or whatever, with other metals in there that interact with
the oxidised aluminium to absorb light across the visible spectrum,
like many metal ores (pure tin oxide is white, but cassiterite, as the
oxide ore, is black due to impurities).


If you look at sites where there is fretting between aluminium parts,
they are usually black (and the debris that comes off on your hands
leaves black marks like graphite or laser toner). Fretting debris is
very finely divided, on steel it looks like cocoa (even though it is
normally Fe2O3 which is a mid-brown in its bulk state).

Aluminium fretting debris will be predominantly alumina. While pure
alumina is white as a micron sized powder, I suspect that it absorbs
light better when more finely divided than that (as fretting debris is
likely to be). My loft ladder has some dark contact sites but the main
rubbing regions are bright and shiny (i.e. covered with a very thin
continuous alumina film).

I think the answer to the garden tool might be a regular wipe with a
greasy rag, or perhaps application of a wax polish (I was interested to
see them do that on a seaman's knife in repair shop earlier).

I agree that there is little risk of toxicity.

On 23/09/2020 20:53, Chris Hogg wrote:
On Wed, 23 Sep 2020 20:49:14 +0100, Andrew
wrote:

On 23/09/2020 18:34, The Natural Philosopher wrote:
On 23/09/2020 18:02, Tim Lamb wrote:
In message , Jimk
writes
Fredxx Wrote in message:
On 23/09/2020 15:45:19, fred wrote:
AÂ* garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

There are exposure limits for aluminium powder in air but not aware of
any health issues regarding skin contact, suggesting there isn't a
known
issue.

The closest I got was this article:
Â*Â* https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/
Look for the first instance of skin, "Aluminium penetration of the skin
is very shallow" though I assume they must mean the oxide.

A general rule is that you should limit exposure to a chemical so
perhaps if there is any concern then wear gloves. Probably not a bad
thing to do in any case.





Was the ali saucepan poison theory debunked?

They clean up well if you cook anything involving Vinegar:-)

And that was the issue. clearly aluminium oxalate was being produced and
ingested.

The question was if that was a Good Thing. To be on the safe side
aluminum saucepans were phased out


An awful lot of aluminium must have been ingested by huge numbers of
people over the decades before they did.

People of Camelford in North Cornwall know a bit about it. Gets into
the brain.
https://en.wikipedia.org/wiki/Camelf...ution_incident

Although that was because it went into the drinking water in a soluble,
ionic form.

On Wednesday, 23 September 2020 15:45:24 UTC+1, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

friction tape, bike handlebar rubber sleeve, paint, gloves.


NT

wrote:

fred wrote:

A garden pick up tool I have is made from Al. tube. Of late it
has started to leave my hands black. I suppose the anodising has
failed? Any easy solution ?
friction tape, bike handlebar rubber sleeve, paint, gloves.

https://avedictionary.com/hpht

Not really, the oxide will erode and effectively leave ally oxide on your
hands. Are you sure it was anodised? Most ones I've seen seem to be a kind
of coating that feels smooth, or are covered by that stuff you get on tennis
racket handles with heat shrink at either end of it.

Brian

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"fred" wrote in message
...
A garden pick up tool I have is made from Al. tube. Of late it has started
to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

Only if you lick it , I'd imagine. I used to get it all the time when I made
my own vhf aerials. I'm still here.
Brian

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"R D S" wrote in message
...
On 23/09/2020 15:45, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has
started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?


I have hand tools that do the same, I wonder if it's harmful?

Fredxx Wrote in message:
On 23/09/2020 15:45:19, fred wrote:
A garden pick up tool I have is made from Al. tube. Of late it has started to leave my hands black. I suppose the anodising has failed?
Any easy solution ?

There are exposure limits for aluminium powder in air but not aware of
any health issues regarding skin contact, suggesting there isn't a known
issue.

The closest I got was this article:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2782734/
Look for the first instance of skin, "Aluminium penetration of the skin
is very shallow" though I assume they must mean the oxide.

A general rule is that you should limit exposure to a chemical so
perhaps if there is any concern then wear gloves. Probably not a bad
thing to do in any case.





Was the ali saucepan poison theory debunked?
--
Jimk


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