It has already been described here, but I have to repeat it again: With greater heat the writing disappears !!!
I have a notebook in the company, in which I take notes in meetings and audios. Valuable info so. The blotter was yesterday in a vehicle in the trunk (the vehicle interior around 25 degrees). So I opened my notebook to write down something hit me the blow: All pages were empty, as if nothing had been there! A shock!
Although a call for pilot showed that they could be turned off again by placing the documents a few hours in the freezer, but I am really shocked at how you can sell something. The notebook is now since noon today in the freezer and the font is slowly but surely reasonably legible ... not the point of it and the reaction from the pilot was anything but reasonable.
So: Anyone who wants to hold important things ... AWAY !!!!!
For notes and things that end up in the garbage anyway, no problem.
I ask, I just know what my daughter says it when her satchel is time in the sun and the homework are gone !?
For me, the issue Frixion has done. As of today, only pens !!!