The Economic Times

The blue ribbon on a $100 bill is not a printed decoration; the U.S. Currency Education Program says it is woven into the paper, and its bells and 100s move when tilted

The $100 bill boasts a sophisticated woven blue stripe embedded with microscopic lenses. When tilted, the bill reveals tiny, dynamic images of bells that appear to flip and slide, thanks to innovative moir magnification technology designed to thwart scanning. These cutting-edge security features are crucial for safeguarding Benjamin Franklin's portrait against counterfeiting efforts, ensuring the integrity of cash transactions worldwide.