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Discussion Starter · #1 ·
Ok, I was wandering and wondering around a 'party shop' earlier with helium filled balloons everywhere, bumping into my face... nice...

Whilst daydreaming about diving I wondered....

These balloons are filled with 100% helium (I'm assuming??)

So... How much He in a mix would you get away with and the balloon still be positively buoyant in air? Could you get away with some 18/45 or would you need something stronger?
 

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Discussion Starter · #3 ·
If there's few enough impurities it might be some ready mixed back gas! Ooooooo :D
 

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Driving my truck with my high-heels on...
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Balloon He contains atleast 21% O2 just in case silly kids (my daughter) breath it to get squeaky voices !
 

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Discussion Starter · #5 ·
The BOC Safety Data Sheet just says that it contains Helium and Air....

However in the hazards....

Never deliberately inhale Balloon gas
Breathing 100% balloon gas will produce unconsciousness and death due to lack of oxygen

:(
 

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No longer a Scapa Virgin
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I know a song that'll get on your nerves
Get on your nerves
Get on your nerves!
:teeth: :teeth: :teeth: :teeth: :teeth:
 

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I've always been thoroughly under the impression that balloon gas had at least 16% O2 in it 'for the obvious reason', but during a recent visit to a big distributor of all sort of gases, the site manager swore blind that all the balloon gas they sold (and it was a lot) was pure, unadulterated He.
The really sad thing is that I was there to commission a brand new security system, so am horribly aware how difficult it is to steal any of those lovely pallet-loads of J's brimming with lovely 100% Helium that are dotted around the place.

Sigh.
 

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Driving my truck with my high-heels on...
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It doesn't. It's air and helium, so it can't possibly contain 21% oxygen.

I can see what you mean so I stand corrected :redface:
 

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beware of limitations
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Sooooooooooo, what we're saying is that it's a premix of some sort - but a Trimix nevertheless. Maybe a 16/ 55 - something like that (?)

hhhhmmmmmmmmmmmmmm. Worth analysing?
 

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"Dyson with Death" diver!
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I found that 45% helium just about kept a normal rubber balloon bouyant as long as it was fully inflated.
 

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I see Red people
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The BOC Safety Data Sheet just says that it contains Helium and Air....

However in the hazards....

Never deliberately inhale Balloon gas
Breathing 100% balloon gas will produce unconsciousness and death due to lack of oxygen

:(




Yea just ask these twos families
2006 Darwin Award: High on Life
 

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Irish Cave Diver in the making
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Ballon gas is a He & Air mix. Not sure what the mix is - 10/52 maybe?
 

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Wreck, reef and muff diver.
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Just wondering... If I get some of these party balloons and put them in a great big bag along with my kit, will I have a lighter bag at airport check-in? :wink:
 

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Likes to play his bongo's in the morning
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sounds like somebody with an analyser needs to order one of these babies...

 
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