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What Is the Difference in Pencil Lead?

Answer

The different types of pencil lead are labeled by the hardness of the lead. The higher the number assigned to the pencil, the harder the lead will be. Hard lead makes lighter marks.
Q&A Related to "What Is the Difference in Pencil Lead"
Do you mean the number and letters on pencils? If so, H means hard and the higher the number, the harder - 9H is as hard as they come and will produce a very thin line with ease.
http://wiki.answers.com/Q/What_is_the_difference_i...
Lead pencils contain not lead. Asian graphite is what's in the middle. Thanks
http://www.chacha.com/question/what-type-of-lead-i...
Pencil Number, Graphite %-wt, Clay %-wt, Wax %-wt 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%
http://uk.answers.yahoo.com/question/index?qid=201...
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