Where do you go to school that you’re even allowed to write in pen? We had standardized tests which were HB-only, and essays were always encouraged to be pencil because we didn’t have much time, and if we made a mistake, waiting for the white-out to dry might cost us.
Also, product not available. Looks like this disappearing pen…. disappeared!
When I sat my exams in school (in England) you could only write in pen to prevent anyone tampering with your answers. You have to cross out mistakes with one line through the word and carry on.