Plasma irradiation removes graphite from the pencil lead, exposing a thin layer of clay. By controlling the exposure time, the thickness of this layer can be varied to modulate the infrared (IR) ...

(KUTV) For literally hundreds of years, they have been called "lead pencils," despite the fact that what is really inside them is graphite. According pencils.com, it all dates back to England in the ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This set of four short (less than 3-1 ...

On March 30, 1858, inventor Hymen L. Lipman patented the first pencil with a built-in eraser—then sold it for $100,000. Believe it or not, this is not the first time in history that a little stick of ...

Laptops may have made hand-writing notes a thing of the past, but the pencil — or at least pencil lead — is making a comeback, as UA researchers are developing ways to use pencil lead as a conductor ...