When the color to be examined is a mixed one, for example, logwood-blue, with prussian blue or indigo, the color of the logwood is first destroyed by dilute acid, the stuff washed and treated with ...

ALTHOUGH prussian blue has been known since 1704, and has long been an important pigment, its chemistry has never been satisfactorily explained. The whole subject is surprisingly confused in spite ...

Should you decorate with navy blue, indigo, cobalt, or Prussian? I took a look back at its history, speaking with art, design ...

Scientists have discovered that an element in Prussian blue, a substance commonly used to give jeans their blue color, ...