In 1968, Dr. Spencer Silver, a chemist at 3M in the United States, accidentally developed a "low-tack", reusable, pressure sensitive adhesive.For five years, Silver promoted his invention within 3M, both informally and through seminars, but without much success.In 1974, a colleague of his, Art Fry, who had attended one of Silver's seminars, came up with the idea of using the adhesive to anchor his bookmark in his hymnbook.Fry then developed the idea by taking advantage of 3M's officially sanctioned "permitted bootlegging" policy.
"S" was really hard to do so i wrote it down.
:( (5 years and 3229 days ago)
Beautifully done..
Damn....
That's really cool!
Great shot, and you are older than I expected, but still just a baby.
Still younger than I expected. Wicked set up
very very cool...amazing colors...well done
Howdie stranger!
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