When accountants made physical entries into a general ledger, red ink was used to show a negative number, and black ink was used to show that a number was positive or profitable. "Red ink" is ...

That's stated on the ballots. Early-ballot instructions tell voters to use black ink and warn them off red ink. "If you put something in red (on a ballot), our tabulator wouldn't be able to read ...

There is no such thing as “black light wavelength”—so why do black T-shirts, black crayons, and black marking pens look black? Investigate a variety of black ink markers ... which stands for red, ...