The most important things are the scanner and printer. You need both very high quality.
Many scanners contain anti-countefeit software which don't allow you to scan money. This can
easily be bypassed by flipping the note vertically.
For the printer you might want to get an offset printing press that have an inked plate and
negatives that are reverse shot, such as the popular Ab Dick 360 which is used by many
professional counterfeiters. Statistics say 1 in 10,000 $100 USD bills are high quality fakes
printed from these. The U.S. Treasury uses 30 tons of gravure printing force to print money.
Unless you have a very large bankroll of capital investment, you won't come close.
A very high DPI laser printer might do, but the Secret Service has most high-end printers
installed with software that makes unique fingerprints on your printed paper. Don't believe me?
Try shining a flashlight with a blue LED on a piece of paper you print from a high-end printer.
The software prints little yellowish, light dots on the paper.
Since 1996, the US started putting watermarks and metal security strips inside the bills. My
method will bypass both the iodine ink test, and the watermark test (holding the bill up to the
light to see the President's face). Because money is made of about 3/4 cotton and 1/4 linen
embedded with silk fibers, iodine pens do not leave a mark. The paper for money is produced by one
and only one company only: Crane & Co, which are the only government contractors signed to print
the money which are shipped to US government Treasury department in armored vehicles to be ready
to print money. Very few have gotten away with robbing these trucks to counterfeit high quality
$100 bills. You don't need to risk this in order to print very good counterfeit money! My method
works just as well. The only test my method does not pass is the UV light test that they use at
banks to determine counterfeit money. Unfortunately. The actual formula for the paper is a
government secret, so nobody knows exactly how to make it. I'm a chemist PhD, so I've tried in my
personal time many different methods and none of them are successful. Cotton bonding doesn't work,
spraying blank newspaper with hairspray, etc. It's almost like conjuring the exact formula for
Coca Cola or the Big Mac sauce. You can come close and even replicate the exact flavour, but you
will most likely never come up with the exact and perfect formulae.