The origin of sticky notes

In 1978, researchers at 3M created the first post-it note. Ferran is a chemical engineer. One day he was singing in the church choir. When he took out the bookmark from a hymn book, he had an idea and invented the post-it paper. Sticky notes from 3M are simple and practical. One section of the post-it paper is coated with adhesive and you can put it where the book needs to be marked. After use, gently tear without leaving any trace.