The Post-it Note came from a failed glue
A 3M chemist made an adhesive that barely stuck. It took six years and a slipping hymn-book bookmark to find a use for it.
In 1968, Spencer Silver, a chemist at 3M, was trying to develop a very strong adhesive for aircraft construction. He ended up with the opposite: tiny microspheres of glue that stuck lightly, peeled off cleanly and could be reused.
For years Silver gave internal seminars about his “solution without a problem”. Nobody had a use for it.
The hymn book
Art Fry, a 3M product engineer, sang in his church choir and was annoyed that scraps of paper marking his hymns kept falling out. In 1974 he remembered Silver’s adhesive and realised it would make the perfect bookmark: sticky enough to stay, gentle enough not to tear the pages.
The slow launch
The first market test in 1977, under the name “Press ’n Peel”, flopped because people didn’t understand the product until they used it. 3M then handed out free samples in Boise, Idaho, and most people who tried them wanted to buy more. The national US launch came in 1980.
The famous canary yellow is said to have come from the scrap paper available in a neighbouring lab. Whether or not that is true, it became the product’s signature.
A useful takeaway: some of the best inventions are solutions waiting for the right problem, and the right person to notice it.
Bring it up
“The Post-it Note started as a failed experiment, and the classic yellow was just the scrap paper the lab next door had.”
