This is the chart from the link below. Please check that for more information. The chart is set up with the columns being Pencil Number, Graphite, Clay, then Wax.
9H 41% 53% 5%
8H 44% 50% 5%
7H 47% 47% 5%
6H 50% 45% 5%
5H 52% 42% 5%
4H 55% 39% 5%
3H 58% 36% 5%
2H 60% 34% 5%
H 63% 31% 5%
F 66% 28% 5%
HB 68% 26% 5%
B 71% 23% 5%
2B 74% 20% 5%
3B 76% 18% 5%
4B 79% 15% 5%
5B 82% 12% 5%
6B 84% 10% 5%
7B 87% 07% 5%
8B 90% 04% 5%
The lead in a pencil is actually graphite, a form of carbon. Graphite is not poisonous.
It's not a 'lead' pencil it's made primarily of graphite
There is no lead in pencil - Pencil is made from graphite
pencil . The 'lead' in a pencil is actually graphite.
Pencil "lead" is not really lead, the metal - Pb. Pencils are made with graphite which is a mineral, an insulator.
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.
Pencil lead does not have coal. Pencil lead contains graphite.
we get lead of pencil from the mixture of clay and graphite
The lead in a pencil is actually graphite, a form of carbon. Graphite is not poisonous.
No ,because there is no lead in a graphite pencil, only carbon.
It's not a 'lead' pencil it's made primarily of 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.
There is no lead in pencil - Pencil is made from graphite
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.
graphite
pencil . The 'lead' in a pencil is actually graphite.
No. Lead is a realtively good conductor. The insulator is the wood on the outside of the lead.