Taiwan has banned the sale of invisible ink pens to prevent students from cheating during school exams."We will bar students from using invisible ink pens during exams because many students are cheating with these pens," an official from the Ministry of Education's Department of Higher Education said.
Invisible ink pens use fluorescent ink, a student can write invisible notes on a piece of paper and take the paper to the exam. During the exam, test-takers can read the notes by shining the ultraviolet light - which is at the other end of the pen - onto the paper.
