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Pencil lead - Hardness | | Pencil lead - Hardness: Encyclopedia II - Pencil lead - Hardness | | Pencil lead is graded by hardness: a greater percentage of clay results in a harder lead. H (harder), F, HB and B (softer) are pencils of average hardness. Pencils ranging from 2B to 9B are softer still and are used for sketching; 2H to 9H are harder than average. A common American #2 pencil is equivalent to HB.
In order, the leads are (from hardest to softest) 9H | 8H | 7H | 6H | 5H | 4H | 3H | 2H | H | F | HB | B | 2B | 3B | 4B | 5B | 6B | 7B | 8B | 9B.
The harder the pencil the lighter the mark, e.g. "b"s tend to a create d ...
See also:Pencil lead, Pencil lead - History, Pencil lead - Hardness, Pencil lead - Mechanical pencils | | | Pencil lead, Pencil lead - Hardness, Pencil lead - History, Pencil lead - Mechanical pencils | | |
| | | Pencil lead: Encyclopedia II - Pencil lead - Hardness
Pencil lead - Hardness
Pencil lead is graded by hardness: a greater percentage of clay results in a harder lead. H (harder), F, HB and B (softer) are pencils of average hardness. Pencils ranging from 2B to 9B are softer still and are used for sketching; 2H to 9H are harder than average. A common American #2 pencil is equivalent to HB.
In order, the leads are (from hardest to softest) 9H | 8H | 7H | 6H | 5H | 4H | 3H | 2H | H | F | HB | B | 2B | 3B | 4B | 5B | 6B | 7B | 8B | 9B.
The harder the pencil the lighter the mark, e.g. "b"s tend to a create darker colour that can be smeared easily.
Other related archives#2 pencil, 1795, American, France, German, Great Britain, Napoleonic Wars, Nicholas Jacques Conté, blockade, clay, graphite, lead, mechanical pencil, pencil, poisonous, sketching
 Adapted from the Wikipedia article "Hardness", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki |
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