description Post-it Note Overview
The Post-it Note is a small piece of stationery featuring a strip of low-tack pressure-sensitive adhesive on its back. It was developed at the 3M company by scientists Spencer Silver, who formulated the reusable adhesive in 1968, and Art Fry, who conceptualized a practical application for it in 1974. The adhesive allows the notes to be attached to documents and surfaces, removed easily, and repositioned multiple times without leaving residue. Since their national launch in 1980, Post-it Notes have become a standard supply in offices and homes.
help Post-it Note FAQ
Did Spencer Silver originally intend to make a weak adhesive when he invented the Post-it Note glue?
No, Spencer Silver was actually attempting to develop a super-strong adhesive at 3M in 1968, but the formula he created bonded only weakly and could be peeled off without leaving residue. The apparent failure sat unused for years until his colleague Art Fry realized its potential for marking hymnal bookmarks at his church choir.
When did 3M first commercially launch the Post-it Note?
3M initially test-marketed the product in four U.S. cities in 1977 under the name 'Press 'n Peel,' but results were mixed. The product was rebranded as 'Post-it Notes' and given a national rollout across the United States in 1980, after which sales rapidly took off.
What was the original size of the classic yellow Post-it Note?
The most recognizable and original Post-it Note measures approximately 3 by 3 inches, the now-iconic square pad format. The distinctive pale yellow color was reportedly chosen partly because the lab next door to the development team only had yellow scrap paper available.
Are Post-it Notes still manufactured by 3M, and is the adhesive formula the same as Silver's 1968 invention?
Yes, Post-it Notes are still manufactured by 3M, and while the exact formulation has been refined over decades, the fundamental concept of a low-tack pressure-sensitive adhesive remains the same. The product line has since expanded to include dozens of sizes, colors, and adhesive strengths sold worldwide.
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