Because pencil "lead" is not lead. Pencils haven't used lead cores since Roman times. However, lead poisoning was still possible up until the mid 20th century as the painted wooden casing often contain high concentrations of lead. Confusion about the source of the poisoning may have led (sic) people to think the core was actually made of lead, however the term "lead" does not refer to the carbon element itself, it's just a general term for a pencil's core. "Put some graphite in your pencil" just doesn't have the same ring to it as "put some lead in your pencil".
the lead in a lead pencil is made from clay and graphite
Lead is an element, it is not made of anything but lead. But if you are talking about pencil lead then pencil lead is made of graphite.
The lead in pencils are not made out of lead, as is common belief. Pencil lead is made out of graphite.
first step in pencil manufacture involves making the graphite core as the "lead". Back in the day we used lead which is toxic, the we switched to Graphite which is non-toxic. --------- It is frequently called "lead" as in "lead" pencils. But there is no lead in Graphite. Pencils simply contain a mixture of graphite and fine clay in varying proportions to make them hard or soft.
Graphite and carbon black, all elementary Carbon (C)
Pencil leads are always made out of graphite. The term lead comes from history, when they were made from lead, but they are now made from graphite.
Pencil is made from graphite
Pencil lead is made of graphite and clay. Newer recipes for pencil lead use waxy polymers to bind the graphite to produce a lead that does not snap when the pencil is flexed.
no a led pencil is made of graphite
There is no lead in pencil - Pencil is made from graphite
A pencil is made out of wood and lead (graphite)
It's not a 'lead' pencil it's made primarily of graphite
pencil . The 'lead' in a pencil is actually graphite.
Pencil lead is made of graphite and clay. Newer recipes for pencil lead use waxy polymers to bind the graphite to produce a lead that does not snap when the pencil is flexed.
the lead in a lead pencil is made from clay and graphite
graphite
graphite