This is because the black ink is actually printed on top of the paper and the black ink is microscopically higher than the paper. Conversely, any green ink is pressed into the paper. If you can feel the ridges in the jacket with your fingernail most likely genuine.

Kind of. Some xerox process printers, particularly the organic drum types, will produce raised letters under some circumstances, but they will not be able to produce the level green ink. No printers can produce the watermark. That is ‘in’ the paper. The xerox process prints are not as ‘stable’ as the US bill printing. I have had the ‘print’ peeled off a piece of paper by volatile compounds in plastic binders. That is because the ‘print’ on xerox process is actually fused plastic ‘dust’ on the surface of paper.