I know nothing about hair. I mean, I know how to wash it, but that’s about where it stops.
What kind of damage (if any) does repeated exposure to alcohol (isopropyl, ethanol, etc.) do to hair?
Context: I see a lot of brush cleaners that are nothing but alcohol and fragrance. (Some have solubilizers or a very small amount of emulsifier/surfactant but those are more rare.) I’m sure synthetic bristles hold up well to this but natural hair, naturally, is different.
What happens when you apply ~100% alcohol to natural hair bristles (goat/squirrel)? What is likely to happen over multiple years of this? Are there effective means to preventing any negative effects?