Experiments with thermochromic hair dye

[Nonentity]

@knoxblox

Though my question is, how severe is the transition in real-life applications? I mean, is the change in the video due to ambient temperature changes, or from being hit with a concentrated stream of air from a hair dryer?

I’m sure that in many regions, the difference between external summertime temps and internal AC would nicely replicate that amount of temp change…