What does this mean??: sur une chevelure et secher par jusqu a ce que les cheveux soilent secs?

Answer 1

There's a bit missing:

. . . on the hair and dry until the hair is dry

Answer 2

This sure wasn't translated by a profesionnal or someone with good knowledge of french... literally it says : on a hair and dry by until hair is dry

This is fairly questionnable... probably from a product or something. I guess it should say : apply or use on hair and dry [with hairdryer] until hair is dry

Answer 3

Sobre una cabellera y secar hasta que los cabellos estén secos