"Pencil" is derived from the Latin word "penis" meaning "tail", because Roman writing brushes were made from tufts of fur from an animal's tail. "Lead pencils" achieve the same effect without ...

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 ...

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 ...

Perhaps you've heard that pencil shavings can be added to the compost pile or used to repel pests from plants. Discover if ...

Even though both darkness and hardness vary among brands, No. 2 and/or HB pencils are widely considered to be the ideal lead grade for writing (and they’re required for many standardized tests).

The Wingback Designer’s mechanical pencil pairs a Japanese mechanism with a British-engineered brass case, creating a pleasingly weighted writing device. The integral reservoir has been designed to ...

After scribbling a good bit of pencil lead on a piece of paper, he attached two paper clips to make a variable resistor, dialed it in to about 300 kΩ, and cut up an old Nokia charger for its USB ...

That’s if Department of Corrections officials adopt a slate of proposed rules cracking down on crayons, markers and greeting ...

Additionally, these pencils feature graphite lead, which is stronger than regular pencils, making them a favorite among ...

Amazon's next big event — Prime Big Deal Days — is just around the corner. Prime Day Part Two will kick off on Oct. 8 and run ...

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. Their technique enabled them to produce pencil ...