So they wanted to have these great things also.
No sooner said than done, from the next stationery store and they have bought these pens from their pocket money.
Well, less graffiti in the booklets are of course a great advantage better than this Tintenkiller lubricating pages;)
BUT: Anything you write with the friction ball pens, dissolves into thin air and is no longer there, when exposed to the heat, even if it is protected in envelopes or bags. Even many a copier makes the ink of this pen on the paper to finishing off - painstakingly crafted things dissolve into air and provide for children and adults for huge frustration !!!!
CONCLUSION: Stay away !!!!!!!!!