
Originally Posted by
Entangled
I don’t think freezing temperatures add moisture to the hair. Rather, they’ll make the moisture in your hair expand and potentially damage it. Not a fan of that language—if you want to infuse hair with moisture, get it wet.
That said, though, I doubt the brush will be able to actually freeze moisture in the hair, though, so the effect may not be too harmful. I personally haven’t noticed much of a difference between rinsing my hair with cool water at the end of my shower, so this may be a your mileage may vary situation. People that get a benefit from cool rinses may have good results with this, and I imagine it might have a use for specific styling techniques.
As for specific claims, I doubt it will be helpful on dirty hair—cold makes sebum more clumpy, so it might just look stringy instead of wet. Chilling wet hair before heat styling honestly strikes me as a practice likely to damage hair—the damage from heat styling comes from the heat itself making water rapidly evaporate from the hair strand and forcing its way out. That’s why it can be drying—first, it literally dries the hair, and then, the structural damage accumulated with time makes it harder for the hair cuticle to lie smooth and closed, which means it’s more porous and easier for water to evaporate out of.
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