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

Pieces of pencil lead on the floor marked up the new carpeting. Only one teacher enforced the new rule, Nora said, pretty much erasing the ban. Nora’s 17-year-old brother Leo Rodriguez said he ...

Common mechanical pencils come in sizes to accommodate 0.5, 0.7, and 0.9 mm leads, but there are bigger and smaller ones available. Perhaps one of those really large drafting lead holders could be ...

National Museum of American History pencil, packaged set National Museum of American History Box of American Lead Pencil Co. Venus Pencils National Museum of American History Wallace Pencil Company ...

The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...