I just got these highlighters, and the really don’t bleed through! They are kind of waxy in a way, almost like a crayon, but better than a crayon. Tres interssant! 🙂 I highlight and rite in my Bible and books like crazy. I have so many notebooks to wade through to find studies I’ve done through the years, so I try to notate as much as I can in Bible now, so I have the revelation I got right there next to the scripture.