31.8 MB (5.6 MB compressed)
2882 x 3858 pixels
24.4 x 32.8 cm ⏐ 9.6 x 12.9 in (300dpi)
SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Graphite pencil core. Coloured scanning electron micrograph (SEM) of layers making up the core of a graphite pencil. This core is made up of graphite, mixed with clay and water and pressed into a rod shape. Because graphite is a soft form of carbon, the tip of the pencil disintegrates under pressure to leave marks on paper.
Model release not required. Property release not required.