I used to bleach my hair using a L'Oreal 'professional' powdered bleach. Since it's a beauty product, finding fast facts has proven difficult. I think maybe i

I used to bleach my hair using a L'Oreal 'professional' powdered bleach. Since it's a beauty product, finding fast facts has proven difficult. I think maybe it uses a different bleaching agent, like http://en.wikipedia.org/wiki/Calcium_hypochlorite http://en.wikipedia.org/wiki/Calcium_hypochlorite As far as I know, that's pretty typical of hair bleaching products. i.e. a powder which isn't hydrogen peroxide. It looks like people use peroxide, but just the over-the-counter stuff, and just for highlights.