Hot air expands, so heat = a tight balloon. I cranked up my electric heater and put a small fan in there too to circulate the air. This method worked well.
I’m pretty adamant about the importance of this step and here’s why…the first two globes that I made just dried in my living room, and throughout the course of the night (cold), next day (warmer) and then night (cold) when they were finally dry, the balloon had changed volumes multiple times and distorted the sphere significantly.
Once the fabric stiffener is dry, remove the balloon from inside the string prison.
First, pop the balloon with a pin. If you’re lucky, it will naturally start to shrink away from the string. If not, you’ve got to start poking at it with a long object. We used a screwdriver. Bit by bit it will come away from the string and pretty soon it will come completely free.
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