31.8 MB (9.4 MB compressed)
2990 x 3720 pixels
25.4 x 31.5 cm ⏐ 10.0 x 12.4 in (300dpi)
SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY SUSUMU NISHINAGA / SCIENCE PHOTO LIBRARY
Pencil tip, coloured scanning electron micrograph (SEM). The shaved wooden surface (upper right, brown) contrasts with the tip (lower left, grey) that is used to write with. This tip is the visible end of a core of graphite and clay. This core is enclosed in wood, and both the outer wood casing and the graphite/clay core are sharpened to form the writing tip.
Model release not required. Property release not required.