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N. J. Conte, 1795, England.
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∙ 11y ago
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Do they use lead or graphite for mechanical pencils?
Mechanical pencils, like the regular kind of pencils, use graphite.
Do new mechanical pencils always have 2B or B lead pencils because when you get the HB refills it is not the same darkness as when you bought it?
Not all mechanical pencils have 2B or B lead. Some pencils have bigger lead.
Do mechanical pencils use energy?
Mechanical pencils themselves do not need any energy in the forms of battery or electricity. However, mechanical pencils do need human energy to work. We need to add lead and push lead out; they do not do this on their own.
Why was the first pencil sharpener invented?
Before mechanical pencil sharpeners, pencils were sharpened by whittling the wood back with a pocketknife to expose fresh pencil lead. This took practice and skill to do properly. Pencils sharpened by hand this way often looked a little "ragged". The mechanical pencil sharpener was invented to simplify sharpening of pencils and produce a more reproducible result without needing endless practice.
How do mechanical pencils work?
It writes like a reagular pencil but when it runs out of lead you press the eraser and more lead comes out. When its out of lead you go buy more depending on the type of mechanical pencil:)
Do they use lead or graphite for mechanical pencils?
Mechanical pencils, like the regular kind of pencils, use graphite.
Do new mechanical pencils always have 2B or B lead pencils because when you get the HB refills it is not the same darkness as when you bought it?
Not all mechanical pencils have 2B or B lead. Some pencils have bigger lead.
When were mechanical pencils invented?
1915
Do mechanical pencils use energy?
Mechanical pencils themselves do not need any energy in the forms of battery or electricity. However, mechanical pencils do need human energy to work. We need to add lead and push lead out; they do not do this on their own.
Why do all pencils have numbers on them?
because it tells you what kind of lead just like for mechanical pencils
How long do mechanical pencils last?
A life time if you have lead.
Is the lead in mechanical pencils really lead?
No, it is a mixture of Graphite (a form of Carbon) and clay.
Do mechanical pencils use lead?
Yes. All pencils use lead - not the element, but a graphite and clay mixture molded into a long narrow strip.
How where mechanical pencils invented?
The first mechanical pencil was invented in Britain in the early 1820s, and patented by John Hawkins and Sampson Mordon in 1822.
Graphite was originally used for pencils until a mixture of lead and clay was invented in 1795?
Graphite was originally used for pencils until a mixture of lead and clay was invented in 1795.
Why was the first pencil sharpener invented?
Before mechanical pencil sharpeners, pencils were sharpened by whittling the wood back with a pocketknife to expose fresh pencil lead. This took practice and skill to do properly. Pencils sharpened by hand this way often looked a little "ragged". The mechanical pencil sharpener was invented to simplify sharpening of pencils and produce a more reproducible result without needing endless practice.
How do you retract the lead in mechanical pencils?
Hold the button that makes lead come out and gently push the lead back in at the same time,
