Re: bleaching herl instructions ?
use 5% bleach solution - 5ml household bleach in 95ml water.
dip the herl in the bleach, gently agitating it until the color changes, then transfer to a 10% vinegar solution to neutralize the bleach.
then transfer to water
if the herl is stripped (no fibers left) decrease the bleach concentration, or decrease the time in the bleach solution, or both.
These chemicals at the concentrations listed (5% bleach and 10% vinegar) are safe to use, there is no risk of chemical reaction affecting you. But do be careful with pure bleach when you're making the diluted solution.