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spider_balloon_halloween.jpg

So, the stuff inside the balloon that makes the web is called HI-FLOAT, and it’s 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 “web” 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 it’s not working as a sealant anymore, but whatevs). I’m pretty sure this trick was developed in-house, by the company that makes it, to sell more HI-FLOAT. Still, it’s pretty cool.

Make: Halloween Contest 2009

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Sean Michael Ragan

I am descended from 5,000 generations of tool-using primates. Also, I went to college and stuff. I write for MAKE, serve as Technical Editor for MAKE magazine, and develop original DIY content for Make: Projects.


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Comments

  1. Stephen says:

    That’s all well and good and HI-FLOAT is used to make the web but how did they get the spiders in there?!

    1. Dave says:

      “but how did they get the spiders in there?!”

      Did ya read the linked article from Crafty Crafty?
      You put in the spider at the beginning, with the Hi-Float.

      I’d suggest filling with hot air and CO2 (breath), for longer duration. Hang by the stems, instead of having them float up…