OT-- Oddball question, very fine magnetic powder in the air....

[Lamont Cranston]

I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
This is in my home, not an industrial area.
Mikek

 

[a a]

On Saturday, 19 November 2022 at 17:17:09 UTC+1, Lamont Cranston wrote:

I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
This is in my home, not an industrial area.
Mikek

replace ferro magnets by Neodymium from hard disks

 

[Lamont Cranston]

On Saturday, November 19, 2022 at 10:34:59 AM UTC-6, a a wrote:

> replace ferro magnets by Neodymium from hard disks

All of the magnets I have are Neodymium.
Mikek

 

[Martin Brown]

On 19/11/2022 16:17, Lamont Cranston wrote:

I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?

Outer space - seriously!

https://www.popularmechanics.com/space/a25008/micrometeorite-collection-rooftops/

Assuming here that you don\'t do arc welding in a neighbouring room...

This is in my home, not an industrial area.
Mikek

If you look at it under a microscope it can be quite interesting. The
sludge that accumulates in plastic gutters is quite rich in it. All you
need it s Nd magnet to harvest it. Popular science project for children.

--
Regards,
Martin Brown

 

[a a]

On Saturday, 19 November 2022 at 17:37:00 UTC+1, Lamont Cranston wrote:

On Saturday, November 19, 2022 at 10:34:59 AM UTC-6, a a wrote:

replace ferro magnets by Neodymium from hard disks
All of the magnets I have are Neodymium.
Mikek

go with your magnets outdoors for more tests

 

[Lamont Cranston]

On Saturday, November 19, 2022 at 11:29:27 AM UTC-6, Martin Brown wrote:

On 19/11/2022 16:17, Lamont Cranston wrote:
I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
Outer space - seriously!

https://www.popularmechanics.com/space/a25008/micrometeorite-collection-rooftops/

Assuming here that you don\'t do arc welding in a neighbouring room...
This is in my home, not an industrial area.
Mikek
If you look at it under a microscope it can be quite interesting. The
sludge that accumulates in plastic gutters is quite rich in it. All you
need it s Nd magnet to harvest it. Popular science project for children.

--
Regards,
Martin Brown

I\'m aware of space dust, I have heard of putting a sheet on your roof to harvest it.
Might be interesting to put a large electromagnet with a paper cover to harvest.
Mikek

 

[Jasen Betts]

On 2022-11-19, Lamont Cranston <amdx62@gmail.com> wrote:

I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
This is in my home, not an industrial area.

Do you mess with printer/copier toner?

--
Jasen.

 

[Phil Hobbs]

Jasen Betts wrote:

On 2022-11-19, Lamont Cranston <amdx62@gmail.com> wrote:
I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
This is in my home, not an industrial area.

Do you mess with printer/copier toner?

Black iron oxide (magnetite). It\'s everywhere.

Cheers

Phil Hobbs

 

[a a]

On Saturday, 19 November 2022 at 23:00:52 UTC+1, Jasen Betts wrote:

On 2022-11-19, Lamont Cranston <amd...@gmail.com> wrote:
I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
This is in my home, not an industrial area.
Do you mess with printer/copier toner?

--
Jasen.

5 years ago I removed old toner from the cartridge to make magnetic ink

 

[a a]

On Saturday, 19 November 2022 at 19:08:43 UTC+1, Lamont Cranston wrote:

On Saturday, November 19, 2022 at 11:29:27 AM UTC-6, Martin Brown wrote:
On 19/11/2022 16:17, Lamont Cranston wrote:
I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
Outer space - seriously!

https://www.popularmechanics.com/space/a25008/micrometeorite-collection-rooftops/

Assuming here that you don\'t do arc welding in a neighbouring room...
This is in my home, not an industrial area.
Mikek
If you look at it under a microscope it can be quite interesting. The
sludge that accumulates in plastic gutters is quite rich in it. All you
need it s Nd magnet to harvest it. Popular science project for children..

--
Regards,
Martin Brown
I\'m aware of space dust, I have heard of putting a sheet on your roof to harvest it.
Might be interesting to put a large electromagnet with a paper cover to harvest.
Mikek

space dust is highly cancerogenic and very harmful when inhaled and enters the lungs

 

[Anthony William Sloman]

On Sunday, November 20, 2022 at 9:58:51 AM UTC+11, a a wrote:

On Saturday, 19 November 2022 at 19:08:43 UTC+1, Lamont Cranston wrote:
On Saturday, November 19, 2022 at 11:29:27 AM UTC-6, Martin Brown wrote:
On 19/11/2022 16:17, Lamont Cranston wrote:
I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws. I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
Outer space - seriously!

https://www.popularmechanics.com/space/a25008/micrometeorite-collection-rooftops/

Assuming here that you don\'t do arc welding in a neighbouring room...
This is in my home, not an industrial area.
Mikek
If you look at it under a microscope it can be quite interesting. The
sludge that accumulates in plastic gutters is quite rich in it. All you
need it s Nd magnet to harvest it. Popular science project for children.

--
Regards,
Martin Brown
I\'m aware of space dust, I have heard of putting a sheet on your roof to harvest it.
Might be interesting to put a large electromagnet with a paper cover to harvest.

Space dust is highly cancerogenic and very harmful when inhaled and enters the lungs.

But by the time it has drifted down through the atmosphere it isn\'t space dust any more. The very small (and very chemically active) carbon particles emitted by coal fires and diesel engines are seriously carcinogenic, but the iron oxide dust around iron mines doesn\'t seem to be all that bad, and iron oxide dust from burned up micrometeorites won\'t be too bad either.

--
Bill Sloman, Sydney

 

[Lamont Cranston]

On Saturday, November 19, 2022 at 4:58:51 PM UTC-6, a a wrote:

> space dust is highly cancerogenic and very harmful when inhaled and enters the lungs

We evolved with it, maybe why we evolved!
Bless the space dust.
Mikek

 

[Jan Panteltje]

On a sunny day (Sat, 19 Nov 2022 17:23:56 -0500) it happened Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote in
<0f823cee-fc67-04d9-b76a-09793a7be5c3@electrooptical.net>:

Jasen Betts wrote:
On 2022-11-19, Lamont Cranston <amdx62@gmail.com> wrote:
I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws.
I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very
fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I
repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they
have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
This is in my home, not an industrial area.

Do you mess with printer/copier toner?


Black iron oxide (magnetite). It\'s everywhere.

Cheers

Phil Hobbs

I have several \'super-magnets\', some small ones stuck to the side of a PC.
Never ever encountered any black stuff on any of those.
No I have an inkjet printer, not used for ages tough...

Air quality is pretty good here, and close to the sea.
http://panteltje.com/pub/levitation_top_cut_img_3037.jpg

If these magnets were covered by stuff I would get TF out of there!
These small ones are useful to magnetize screwdrivers and pull out screws,
hold pens on the side of the PC, etc.

 

[Martin Brown]

On 20/11/2022 02:40, Lamont Cranston wrote:

On Saturday, November 19, 2022 at 4:58:51 PM UTC-6, a a wrote:

space dust is highly cancerogenic and very harmful when inhaled and enters the lungs

We evolved with it, maybe why we evolved!
Bless the space dust.
Mikek

Some of the dust in space contains polycyclic hydrocarbons like benzene
Buckminsterfullerenes (which were first observed in molecular clouds
with a spectrum that matched nothing known at the time on Earth).

The rare carbonaceous chondrite that landed in the UK a couple of years
ago contains more than its fair share of interesting organic compounds
including water with similar isotope ratios to that on Earth..

https://www.science.org/doi/10.1126/sciadv.abq3925

The higher abundance of L-isovaline in such meteorites is thought to be
one reason why life evolved using L-amino acids as building blocks.

And a more popular science but somewhat mangled article on the BBC

https://www.bbc.co.uk/news/science-environment-63631563

\"A A\" is a clueless illiterate moron.
Comparison with two short planks would be insulting to the planks.

--
Regards,
Martin Brown

 

[Anthony William Sloman]

On Sunday, November 20, 2022 at 8:55:16 PM UTC+11, Martin Brown wrote:

On 20/11/2022 02:40, Lamont Cranston wrote:
On Saturday, November 19, 2022 at 4:58:51 PM UTC-6, a a wrote:

space dust is highly cancerogenic and very harmful when inhaled and enters the lungs

We evolved with it, maybe why we evolved!
Bless the space dust.

Some of the dust in space contains polycyclic hydrocarbons like benzene
Buckminsterfullerenes (which were first observed in molecular clouds
with a spectrum that matched nothing known at the time on Earth).

How much of that would survive the descent through the ozone layer?

The rare carbonaceous chondrite that landed in the UK a couple of years ago contains more than its fair share of interesting organic compounds including water
with similar isotope ratios to that on Earth..

They are rare because they have to be big enough for an inner core to survive descent through the atmosphere at essentially escape velocity. They will get cooked on the way down while the outer layers get burnt off.

https://www.science.org/doi/10.1126/sciadv.abq3925

The higher abundance of L-isovaline in such meteorites is thought to be
one reason why life evolved using L-amino acids as building blocks.

And a more popular science but somewhat mangled article on the BBC

https://www.bbc.co.uk/news/science-environment-63631563

\"A A\" is a clueless illiterate moron.
Comparison with two short planks would be insulting to the planks.

He is also a vociferous ignorant moron, and keeps on claiming to have worked on demanding high tech projects. His capacity to make implausible claims is up there with Gnatguy.

--
Bill Sloman, Sydney

 

[Martin Brown]

On 20/11/2022 13:16, Anthony William Sloman wrote:

On Sunday, November 20, 2022 at 8:55:16 PM UTC+11, Martin Brown
wrote:
On 20/11/2022 02:40, Lamont Cranston wrote:
On Saturday, November 19, 2022 at 4:58:51 PM UTC-6, a a wrote:

space dust is highly cancerogenic and very harmful when inhaled
and enters the lungs

We evolved with it, maybe why we evolved! Bless the space dust.

Some of the dust in space contains polycyclic hydrocarbons like
benzene Buckminsterfullerenes (which were first observed in
molecular clouds with a spectrum that matched nothing known at the
time on Earth).

How much of that would survive the descent through the ozone layer?

The rare carbonaceous chondrite that landed in the UK a couple of
years ago contains more than its fair share of interesting organic
compounds including water
with similar isotope ratios to that on Earth..

They are rare because they have to be big enough for an inner core to
survive descent through the atmosphere at essentially escape
velocity. They will get cooked on the way down while the outer layers
get burnt off.

I don\'t know for sure but they are incredibly rare. Probably because
they practically fall apart with the slightest jolt (and will do the
same in space). Spend too much time in the sunlight and all the volatile
components will be lost - same way that comets and meteor streams arise.

Their remnants along cometary orbits may well be responsible for most of
the meteors we see that burn up in the upper atmosphere.

Some of the software I used to do was for analysing meteorites and I
know they get incredibly excited about the Europium anomaly. If present
it indicates a planet that formed sufficiently to have stratified as an
iron core, SiMa, SiAl crust and was then smashed to bits in a collision.

en.wikipedia.org/wiki/Europium_anomaly

Europium has radically different solubility in the different molten rock
formulations so it acts as a marker for planetary formation (or not).

The nickel iron meteorites and stony ones are very much more robust than
the much rarer carbonaceous chondrites which have to reach Earth PDQ and
be found soon after landing if any of the interesting compnents are to
survive. Amazingly for a modest sized one it mostly holds together
bonded by water ice until it hits the deck whereupon it disintegrates.
See the picture fig 1 in the Science article it looks for all the world
like a small heap of grey cinders.

>> https://www.science.org/doi/10.1126/sciadv.abq3925

--
Regards,
Martin Brown

 

[a a]

#shutupustupiddog

 

[a a]

#shutupidiotfromsydney

 

[a a]

#dailydreamingbymoronfromsydney

 

[Phil Hobbs]

Jan Panteltje wrote:

On a sunny day (Sat, 19 Nov 2022 17:23:56 -0500) it happened Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote in
0f823cee-fc67-04d9-b76a-09793a7be5c3@electrooptical.net>:

Jasen Betts wrote:
On 2022-11-19, Lamont Cranston <amdx62@gmail.com> wrote:
I thought about mounting a light above my bench. To find the joists, I used some strong magnets to locate the drywall screws.
I left the magnets in place while I thought about it. After a week or so, I took the magnets down, I found there was a very
fine blackish magnetic material on the magnet. It is very fine and difficult to remove, but I worked at it until it was gone. I
repeated the experiment again, a week later I see this magnetic material is on the magnet again.
So I looked at the dozen or so magnets stuck to the panels on my bench, they all have the powder, but much less, and they
have been stuck on the metallic parts of my bench for years.
Where does such a fine ferrous powder come?
This is in my home, not an industrial area.

Do you mess with printer/copier toner?


Black iron oxide (magnetite). It\'s everywhere.

I have several \'super-magnets\', some small ones stuck to the side of a PC.
Never ever encountered any black stuff on any of those.
No I have an inkjet printer, not used for ages tough...

Air quality is pretty good here, and close to the sea.
http://panteltje.com/pub/levitation_top_cut_img_3037.jpg

Yeah, but all you guys have is mud.

If these magnets were covered by stuff I would get TF out of there!
These small ones are useful to magnetize screwdrivers and pull out screws,
hold pens on the side of the PC, etc.

Cheers

Phil Hobbs


--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com