Often, but not always, more expensive pencils have better precision. Different pencils also produce lead at different rates, meaning with each click, the pencil advances a specific length of lead. The ...

Mimicking the form and shape of a classic lead pencil, this mechanical pencil epitomizes the Muji ethos of simple, pure, functional products. Designed to slot easily into notebooks, with a clip and ...

The Blick Premier is available in the two most popular mechanical pencil lead sizes, 0.5 mm and 0.7 mm. As with other mechanical pencils, you can fill it with any type of lead hardness, from hard ...

Lead retracts with the help of a lockable sliding sleeve, and there’s also a lead grade indicator if you’d like to experiment with different types. Buy now £28.30 , London Graphic Centre ...

My general clumsiness prohibits me from using any mechanical pencil with a lead below a thickness of 1.3 millimeters without breaking the pencil at least once a word. A 1.3-millimeter lead is so thick ...

Previous methodologies for making sensors involved dissolving the nanotubes in dichlorobenzene, which is an organic solvent that is labeled a carcinogen and an environmental hazard. The new approach ...

A class of fifth-graders from Green Acres Elementary in Lebanon, Ore., asked us to find out how pencil lead is made. That quest took us all the way back to the dawn of the universe and then all ...

Mechanical pencils come in a variety of lead widths. According to Wirecutter senior staff writer Melanie Pinola, who wrote our mechanical pencils guide and has tested 61 writing implements for ...