• Manufacturer = ‎Kores
• Brand = ‎Kores
• Kores Multicopy Pen/Pencil Carbon Paper
• Pack of 100 Sheets
• Color = Blue
• Size: 210 mm x 330 mm

Carbon paper is slightly harder and the pencils have a wood casing, so your fingers aren't actually making contact with the carbon itself.

If you like things fast and don't mind things a bit messy, use charcoal.

If you hate mess, but don't mind going over something many times to get something filled in solidly, use carbon.