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Graphite material for pencil making
Pencil lead is most commonly a mix of powdered graphite and clay. It is chemically unrelated to the metal lead, whose ores had a similar appearance, hence the continuation of the name. Plumbago is another older term for natural graphite used for drawing, typically as a lump of the mineral without a wood casing.
| Grade | Fixed Carbon (%) |
Particle Size (mesh) |
Moisture (%) |
PH | Fluoride (ppm) |
Chloride (ppm) |
| HS3299AA | >99 | +32 | <0.5 | 6-8 | <50 | <50 |
| HS59998AA | >99.98 | +50 | <0.5 | 6-8 | <50 | <50 |
| HS59995AA | >99.95 | +50 | <0.5 | 6-8 | <50 | <50 |
| HS599AA | >99 | +50 | <0.5 | 6-8 | <50 | <50 |
| HS899AA | >99 | +80 | <0.5 | 6-8 | <50 | <50 |
