I was counting my paper money today and this popped out at me. First thing is the green above the serial number on upper right. Second is the missing paper on the reverse. How many layers of paper do they use per bill?
The missing layer of paper is what is called a “paper pull.” It’s what happens when you attach tape to paper and go to pull it off and it pulls off a layer of the note. I consider that damage.
As Steve stated, it is more like damage than something that happen at printing time. The excess green ink above the serial number, isn't all that unusual and can be either a transfer from another note, or excessive amount of ink on the serial number roller. Neither adds any additional value to the note. This is from: http://www.madehow.com/Volume-3/Paper-Currency.html Materials With paper money, the materials are as important as the manufacturing process in producing the final product. The paper, also known as the substrate, is a special blend of 75% cotton and 25% linen to give it the proper feel. It contains small segments of red and blue fibers scattered throughout for visual identification. Starting in 1990, the paper for $10 bills and higher denominations was made of two plies with a polymer security thread laminated between them. The thread was added to $5 bills in 1993. This thread is visible only when the bill is held up to a light and cannot be duplicated in photocopiers or printers. The inks consist of dry color pigments blended with oils and extenders to produce especially thick printing inks. Black ink is used to print the front of the bills, and green ink is used on the backs (thus giving rise to the term greenbacks for paper money). The colored seals and serial numbers on the front of the bill are printed separately using regular printing inks.
