In electrophoretic displays, tiny white and black pigment particles are given opposite electrical charges and encapsulated in microcapsules of about the diameter of a human hair.

ECONOMIST: REPORTS

Among other things, the Tarantinos stripped paint from faded black concrete floors and tracked down their original red pigment.

WSJ: The Pleasures and Pitfalls of Frank Lloyd Wright Homes

Among other things, the Tarantinos stripped paint from faded black concrete floors and tracked down their original red pigment also the shade of the terrace floor.

WSJ: The Pleasures and Pitfalls of Frank Lloyd Wright Homes

When an electric field is applied to a microcapsule, the pigment particles within it move, turning one side of the capsule white and the other black.

ECONOMIST: REPORTS