One platinocyanide salt with interesting conductive properties is Krogmann's salt.

Röntgen thus saw the first radiographic image, his own flickering ghostly skeleton on the barium platinocyanide screen.

A platinocyanide is a salt containing the anion Pt(CN).

Striking a match, he discovered the shimmering had come from the location of the barium platinocyanide screen he had been intending to use next.

The Edison fluoroscope produced sharper images than the Röntgen fluoroscope, which used barium platinocyanide.

Before setting up the barium platinocyanide screen to test his idea, Röntgen darkened the room to test the opacity of his cardboard cover.

The use of Sidot's blende (zinc sulfide) instead of barium platinocyanide as a luminescence material to make the radioactive rays visible was a commonly accepted improvement.

Barium platinocyanide, BaPt(CN), was important in the discovery of X-rays, and in the development of the fluoroscope.

The beginning of fluoroscopy can be traced back to 8 November 1895 when Wilhelm Röntgen noticed a barium platinocyanide screen fluorescing as a result of being exposed to what he would later call x-rays.

Until Edison discovered that calcium tungstate fluoroscopy screens produced brighter images than the barium platinocyanide screens originally used by Wilhelm Röntgen, the technology was capable of producing only very faint images.

He knew the cardboard covering prevented light from escaping, yet Röntgen observed that the invisible cathode rays caused a fluorescent effect on a small cardboard screen painted with barium platinocyanide when it was placed close to the aluminium window.