The new $100 note begins circulating Tuesday. Over a decade of research and development went into its new security features.
... Look for a blue ribbon on the front of the note. Tilt the note back and forth while focusing on the blue ribbon. You will see the bells change to 100s as they move. When you tilt the note back and forth, the bells and 100s move side to side. If you tilt it side to side, they move up and down. The ribbon is woven into the paper, not printed on it.
... Look for an image of a color-shifting bell, inside a copper-colored inkwell, on the front of the new $100 note. Tilt it to see the bell change from copper to green, an effect which makes the bell seem to appear and disappear within the inkwell.
... Hold the note to light and look for a faint image of Benjamin Franklin in the blank space to the right of the portrait. The image is visible from either side of the note.