So, the stuff inside the balloon that makes the web is called HI-FLOAT, and itโs a commercial product actually sold for injecting into helium balloons to make them retain their helium longer. It forms a skin on the inside of the balloon and keeps the helium from diffusing out so quickly.
The โwebโ effect is created by applying the HI-FLOAT and letting it dry at one pressure, and then deflating the balloon, stressing it, and then re-inflating to a higher pressure, causing the film to detach from the walls (which, of course, means itโs not working as a sealant anymore, but whatevs).
Iโm pretty sure this trick was developed in-house, by the company that makes it, to sell more HI-FLOAT. Still, itโs pretty cool.
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