The adhesive for Post-its ® was invented in 1968 by a research scientist for 3M. It was a quirky substance and deemed unusable. Years later another research scientist got stuck on the idea of the semi permanent adhesive and gave new life to the product. After a brief stint as hymnal book markers, the first blocks of notes partially coated with the tacky adhesive were tested in 1977. The rest is history and by 1990 Post-it Notes® were one of the top 5 best selling office products in the U.S.
Read more fun Post-it® trivia including the fact that they are (and have always been) recycleable- it's a great testament to innovative stick-to-itiveness!
Photo by 3M