“Note that the green security lines don’t bend when the black lines do.
Because the green security lines aren’t original, but part of the paper it was printed on.”
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your explanation does not make any sense. how can you print one document onto another without the original blocking out whole portions of the underlying paper? in other words, if the BC had been printed on green security paper, the BC would have to be transparent in order for the green security paper to show through? right??? can someone expand?
Simple. The security paper comes in blank sheets. Take a blank piece of security paper, load it in a copier, and then make your copy of the original.