It can, for example, be mixed into the ink or paper that is used to make passports or currency.

ECONOMIST: MONITOR

Eight questions were selected from each decade, and were mixed up in the examination paper, so that students could not easily tell which decade they came from.

BBC: Past science papers stump pupils

Mostar should be different: on paper, it is the only truly mixed Bosnian city.

ECONOMIST: Bosnia, rebuilt but still divided

After that the sludge is mixed with fiber and skin from seasonal fruits to help hold the paper together.

FORBES: Magazine Article

Paper Mario Sticker Stars is the perfect paper-craft world for imaginative players willing to look beyond its mixed platforming and role play ambitions.

FORBES: Don't Overlook Paper Mario: Sticker Stars Because it Breaks Convention

To create his test, Jack mixed human mesothelin-specific antibodies with carbon nanotubes and coated strips of ordinary filter paper.

FORBES: Cancer, Innovation and a Boy Named Jack