Soap bubble freezing - GIF

Soap bubble freezing.

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Previously:

https://www.homemadetools.net/forum/...960#post220916
https://www.homemadetools.net/forum/...907#post175591
https://www.homemadetools.net/forum/...803#post152335

That's wild watching the progression of the inner and outer surfaces of the bubble solidify.

unexpectedly cool!

I remember my materials units at uni, studying dendritic crystal growth and the impact on the hardness of steels.