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 |