I wonder why some company doesn't begin to sell compressed
nitrogen gas in spray cans, complete with a tube as found on many
lubricant cans. For foods, a blast of Nitrogen into a zip lock
baggie would help keep food from oxidizing, while a blast into a
paint can before resealing might lengthen the storage life of the
Am I wrong in my assumptions that it would do this?
Luxury cars now offer a great seating option for politicians.
Just adding nitrogen won't make much difference. You'd have to find some
way to suck out the normal-ratio air out at the same time, or there
would still be plenty of oxygen in there. Hence all the vacuum-baggie
food sealing machines. I find that manually deflating the zip-lock
baggie as I seal it (by careful folding and pushing) helps prolong the
time the food stays tolerable. Makes a big difference with cheese and
such. (Alright, I confess- I live alone, so I suck the last bit of air
out with my mouth, and dog down the zipper with my teeth.)
No good suggestions about the paint, other than the 'store it upside
down' idea. I seldom bother, but don't paint that often, and store the
latex paint in a heated basement, so I have never really had any
there IS(was?) a company that sells compressed nitrogen in spray cans.
it was made for filling opened paint cans so a skin would not form on the
surface.I couldn't find it with Google,though.
ISTR it was also sold in camera stores,to preserve photo chemicals.
you also can get paintball bottles filled with nitrogen.
then there's the adapter/regulator to use the bottles with air tools.
I insert a soda straw,nearly close the zipper,then suck the air out,then
pullout the straw with my teeth and close the zipper fully.
Technically you are correct. Practically, the spray cans are pressure
limited (70PSI or some such?) so the gas volume is gone in one blast.
Liquid propellants are used to produce longer lasting operating
pressure for spray products, various Freons, propane among others.
Using crude arithmetic, a 2.5" x 6" spay can at 9 cubic inches will
hold about 45 cubic inches of gas at STP given 70 PSI initially. So
maybe a half dozen Ziplocks might be serviced. Not too good a return
on your expenditure.
Figure out a way to keep nitrogen pellets around at -200 degrees C and
you could have a neat product.
Go to your local wine purveyor and buy a can of "Private Preserve". It
is a mix of inert gases including nitrogen that is used to spray into
opened wine bottles to displace the oxygen and extend the life of the
bottle of wine. Altough I have a vacuum cap and seal unit that I find
works VERY well instead. Also, try dry ice. Place a unit of dry ice on
some paper towel on the top of your stored food and place the lid on
lightly so that the evaporating gas can escape. When the dry ice block
has melted (evaporated), tightly seal the container.
Air is about 78% nitrogen, the issue is removing the oxygen so you
need to pull a vacume first. They charge alot extra to inflate tires
wirh nitrogen, but how do they remove the oxygen, I dont think they do
I guess it depends where you buy tires. The local evil mom & pop place
doesn't charge a lot more or even more for that matter. They have a unit
similar to this in the garage:
By design a tire cant be fully deflated of air, air is 78% nitrogen,
so what is the true percentage of nitrogen in tires filed with
nitrogen, it will still contain alot of oxygen. But I guess if it
works its worth it.
And I'd say it's just another scam to get more money out of unwitting
consumers. Nitrogen would seem to have no compelling advantage.
Supposedly it means tires are less susceptable to pressure change with
ambient temp change, nitrogen will leak out slower, etc. If you have
enough sense to check your tire pressure regularly, none of that
matters. And if you don't, then I'd say nitrogen is a poor
On 2/24/2010 10:01 AM, firstname.lastname@example.org wrote:
Works for me. One of our vehicles has always had issues with slow tire
leaks. The wheels are clean with no rust and aren't bent. I had four new
tires tires installed at the local evil mom & pop tire place last year
and they used nitrogen this time (at no additional charge) and now the
slow leaks are gone.
New tires and more careful mounting eliminated the leaks, not nitrogen.
Nitrogen isn't really a scam per-se, more of a distortion. Folks found
that racing teams were using nitrogen for it's advantages when used in
low volume race tires running *hot* at a couple hundred miles per hour
and figured if the racers used it they should too. The reality is it is
of no benefit for normal vehicles with normal tires operated at normal
Aluminum rims, or steel? Every car I have ever had with aluminum rims
had problems with slow leaks during cold weather, until I had tire guy
paint the rims with some magic goop as he put the tires on. I suspect
that is what solved your problem as well- their installer just did it
correctly without prompting. Never had the same problem with steel rims.
I'd never pay extra for aluminum rims, but since I buy used cars only, I
don't get a choice.
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