51.1 MB (2.0 MB compressed)
3646 x 4902 pixels
31.0 x 41.4 cm ⏐ 12.2 x 16.3 in (300dpi)
MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY MARTYN F. CHILLMAID / SCIENCE PHOTO LIBRARY
Wash-basin. Soap scum (white residue) formed around a wash-basin. Also seen is a bar of soap at upper left. Scum precipitates when soap reacts with the calcium salts present in hard water.
Model release not required. Property release not required.