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E, DanielYou can't begin to apply ink in such sporadic, limited, lightly worn and faded effect - consistently via the printing process....no matter which inks are applied or left out. And all 4 colors appear plainly on the card, unless you've photoshopped the piece and autocorrected in some of the color that is in fact absent.
Clearly the card has had the inks faded/removed by some process, and it looks entirely chemical by appearance.
Daniel
Edited to remove the moniker "the fool" after my name.