| 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. |