What percent of graphite is in a pencil lead?

Answer 1

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%

Answer 2

The percentage of graphite in a pencil lead can vary, but it typically ranges from 10% to 20%. The rest of the composition is made up of clay and other binding materials that help give the pencil lead its structure.