Or maybe for a long time?
Googling doesn’t help
Back in the day I would comb a perm solution through my hair. I’de continue to comb throughout the specified time and then rinse/condition per the box instructions. I recall being happy with the results. Not sure if they still sell at home perm kits, though.
Yes, japanese hair straightening techniques achieve this. I learned a lot about hair straightening from reading Curly Hair, Curly Girl reddits etc. Because they aim to avoid straight hair and instead train locks to maintain curls, they actually talk a lot about what will cause hair to remain straight.
Chemotherapy has been known to sometimes change the curliness of a persons hair… when it grows back.
If you live to see it grow back :(
I’ve know four people, including myself who suffered hair loss with chemo. All our hair grew back more curly initially but eventually returned to pre chemo curliness.
Varnish.
Remember, if you can’t find metal resistant stucco lathe, use carbon fiber stucco lathe!