50.0 MB (3.1 MB compressed)
5118 x 3412 pixels
43.4 x 29.0 cm ⏐ 17.1 x 11.4 in (300dpi)
GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Gymnastic chalk. This powder is used in sport as a drying agent to prevent loss of grip. It is composed of magnesium carbonate compressed into a solid lump. It is also used in rock climbing and weightlifting.
Model release not required. Property release not required.