Then there are the ever-present problems that can cut into profits or change black ink to red.

Just going back to tattoos, if someone could invent a black ink that stayed black in the human epidermis, they'd make a fortune.

Limiting fiscal policy to black ink in fear of inflation stifles growth.

Sheltered beneath so much black ink, key individuals still get off lightly.

Not only did every superhero have a chest logo to identify him amid the blur, black ink lost its tone and came out blue.