I hate days like this. Someone asks an interesting question and my brain
goes all sideways with it till I can find a satisfactory answer. I suppose
it's a variation on this classic:
https://xkcd.com/356/

So googling "Industrial uses for Krypton" led me down a rabbit hole.
This page from Praxair
http://198.190.156.115/gases/buy-krypton-gas#!tab=3Dapplications
Seems to suggest that window manufacturers may be worth talking to....
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