Lead is a grey or silver-white soft metal. We've been using lead for thousands of years, because it's so useful. Unfortunately, lead is quite toxic to humans, which is why we have mostly replaced it ...

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) ...

Q Were pencils ever really made with lead, or has it been graphite all along? A Stefan, when I read your question I thought, "I betcha they were once made with lead -- say, back before the 1920s. Then ...

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 ...

Please provide your email address to receive an email when new articles are posted on . Graphite is a substance made of carbon, and ocular trauma in a younger age group has been known to happen with ...

The most valued commodity in the schoolyard marketplace is one of the most basic. Every kid wants a pencil—especially a carefully carved stub of a pencil called a mini. Sasha Portnoy, a 9-year-old ...