Now, in a recent study, researchers from Japan found a simple and low-cost way of tuning the reflectance spectra of pencil lead samples using plasma.

But, you certainly wouldn't want to suck on a "lead" pencil if it really had lead in it. In fact, lead pencils became extinct only in the early 20th century.

If you want to adjust the length of the pencil’s lead sleeve and its lead cushioning: Consider the highly customizable Platinum Pro-Use 171.

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 ...

Although commonly referred to as the lead pencil, even in Lipman's patent application, they are actually made of non-toxic graphite. "Nuremberg, Germany, was the birthplace of the first mass ...