What was the original failed product that eventually led to the invention of Post-it Notes at 3M?

Product design often comes from unexpected places! Some of the world's most successful products were created through happy accidents or by solving problems no one realized they had. This poll tests your knowledge about the invention of one of the most ubiquitous office supplies that revolutionized how we organize information and share notes. The story behind this simple yet ingenious product reveals how innovation can emerge from persistence and recognizing opportunity in failure.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

A super-strong adhesive that bonded too permanently
A weak adhesive that could stick temporarily without leaving residue
A heat-sensitive paper that changed color when touched
A waterproof notebook paper that was too expensive to mass-produce