.Like the history of the post it note, some of the best inventions were created by accident. In 1968 Spencer Silver, with a PhD in organic chemistry, worked for 3M as a senior chemist. Among 3M’s most popular products at the time were different kinds of adhesives. And Silver worked on a project to create a new kind of stronger glue. Unfortunately his prototype was a failure: the glue was weak, too weak to be useful for anything. It was more of a sticky substance than a bonding glue.
For many years Silver tried to find uses for this substance, but despite many experiments couldn’t find any. Most people would have given up, but he kept trying. In 1973 he had a new boss, Geoff Nicholson, and Spencer pitched him on the idea of using his creation on bulletin boards and other surfaces to make them sticky (eliminating the need for pushpins). But the potential seemed limited.
Another 3M employee named Art Fry saw a lecture by Silver where he talked about this curious substance he’d created and his inability to find uses for it. Fry and Silver worked together to create new prototypes for a paper with the weak glue that could be put on almost any surface. Fry suggested that Spencer’s design had it backwards: instead of making a surface sticky, the glue should be on the paper itself.
Prototypes of their work were popular in the 3M office, enough so that in 1977 executives approved a test release of a “Press ‘n Peel” product, as it was first called.
The response to the test wasn’t positive Nicholson and others felt that the product wasn’t marketed well. They felt that free samples needed to be given away. So people could understand the concept. Finally, in 1978 a second product release took place in Boise, with free samples, and it was a success. Soon the product was launched to the world in 1980 and is now one of the most popular office supply products in history. And the post it note was invented.