Graphite pencil core. Coloured scanning electron micrograph (SEM) of 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. Magnification: x25 when printed 10cm high | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Nishinaga, Susumu |
Taille de l’image : | 2912 px × 3789 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |