What would you like to do?
What type of friction do you use when you leave marks on paper with pencil lead?
yea. actually graphite, allitopes element of carbon. its not really all LEAD
It is called "lead" because the original pencils were made from soft lead. However lead is a toxic heavy metal. Modern pencil "lead" is made of graphite and a binder. …The most common binders are clay or plastic resin. This is completely nontoxic and the hardness can be precisely controlled to meet the requirements of different users.
Yes, a scanner is like a copy machine. If it is on the paper, it will be copied into the digital image. You may use photo editing software to remove any marks or flaws t…hat you do not wish to keep.
Pencils never actually used lead. When Pencils were created after a tree was knocked down during a storm it revealed a large mass of black substance thought to be lead. When t…ested it turned out to be a carbon mixture. It was named graphite years later after the greek meaning "to write".
Yes. All pencils use lead - not the element, but a graphite and clay mixture molded into a long narrow strip.
The element used in the 'lead' pencils is not actually lead but carbon, in the form of graphite.
The graphite is reflective to the electronic beam.
a chromotagraphy is intended to split up a mixture of compounds into its subparts. if you use a pen, the ink will also be separated. that is why you use a pencil instead. Grap…hite (pencil lead) cannot be broken up into further components which can be separated by TLC and it is also not likely to cause reaction with any TLC components.
The answer depends on a variety of variables, but the simplest is that barring further action on the pencil mark (rubbing, wear, etc), it will last as long as the paper.
The lead in pencils is made of the element carbon, in the form of graphite. Graphite powder is mixed with clay and wax. The more graphite the pencil contains, the softer the l…ead, and darker the mark.
When a pencil is rubbed on paper fiction causes a small amount of the graphite from the core of the pencil to be left on the paper. This leaves a visible mark.
No. Lead used to be used in pencils but they stopped using it in them becasue of lead poisoning from pencils. Now they use graphite instead
Graphite is used to make pencil lead, but it is not a form of coal.
there is no lead in lead pencil.
Even though it is called lead that is in the pencil, there is no actual lead in the pencil whatsoever. In fact it is made of a mixture of graphite and clay that is baked hard …and put in the pencil.
Pencils were never made with lead, they have always been made with graphite. When pencils were first made it was beleived that graphite was a type of lead, but science has now… proven graphite is a type of carbon, not lead. Well, i didn't want to delete this person's answer, but it is wrong. In fact, lead was used in pencils for hundreds of years, but there was a major problem with using lead. These pencils would form lead oxide on the tips, making it difficult to write, so when people wanted to write, they would lick the lead of the pencil to get the lead oxide off. When people realized that this was dangerous because consuming lead (even in minute quantities) can cause brain damage, pencils began to be manufactured with graphite instead of lead. Coming back to your original question - I don't know when they switched to graphite, but I think that it was sometime in the first half of the 20th century.