US to introduce delayed $100 bill in October

In October the US Federal Reserve will introduce a revamped $100 note that uses 1000s of tiny lenses to thwart fakes.

The bill was initially due to go into circulation in February 2011 but was delayed indefinitely to fix a creasing issue caused by anti-counterfeiting technologies. A 3D ribbon made up of tiny lenses, making it appear to move in the opposite direction to the bill, is one of nine new security features incorporated within it.

In the two years since delaying the $100 note the bank has modified the paper feeder on printing presses to handle variations in the 3D security ribbon paper, the Associated Press reports. The changes have reportedly fixed the problem of unwanted creases in the note.

When the bill is released it will mark the end of the currency redesign project that began in 2003 with the addition of splashes of colour to $20 notes. Since then $50, $10 and $5 notes have been revamped.

An interactive tour of the new note, explaining the new security features can be viewed here.