What was the original adhesive on Post-it Notes designed to be before it became the foundation for one of 3M's most successful products?

In the world of inventions, some of the most impactful products came about by accident. The Post-it Note revolutionized how we organize information and communicate in workplaces worldwide. This iconic invention combines clever chemistry with practical design, but its path to market success wasn't as straightforward as you might think. Test your knowledge about this famous sticky innovation that changed office culture forever!

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A super-strong glue that accidentally failed and created a weak, repositionable adhesive instead
A medical adhesive for surgical bandages that wouldn't damage skin when removed
A heat-activated bonding agent for aerospace applications
An environmentally friendly alternative to traditional rubber cement