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Spencer Silver discovers low-adhesive microspheres
As a senior scientist working for 3M, Silver was tasked with developing new, stronger adhesives. Instead, these indestructible acrylic spheres were “strong enough to hold papers together but weak enough to allow the papers to be pulled apart again without being torn". -
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For five years, Silver looked for a product he could stick his microspheres to
At one point, he had tried to use his microspheres on a pin board, but found that dust and thread kept sticking to it. -
Fry Comes Up With an Idea to Use Silver's Microspheres
Art Fry needs a bookmark that will stick to his hymnal without ruining the pages, and he remembers all the seminars he had attended at 3M. Spencer Silver had created new tacky, low-adhesive microspheres, which might just work. -
"Press 'n Peel" notes were released
The removable notes were released under the name "Press 'n Peel" in four cities. -
The "Post-It Note" is released all over the United States
After a successful sampling campaign and a renaming, the sticky notes are a hit. Its iconic color was chosen by happenstance; the lab only had yellow scraps of paper left over. -
Post-it® Easel Pads are introduced to the market
