KLAUS GULDBRANDSEN / SCIENCE PHOTO LIBRARY KLAUS GULDBRANDSEN / SCIENCE PHOTO LIBRARY
Washing powder research. Technician holding an artificially-soiled cloth used in washing powder research. The cloth is washed in detergent to test its ability to remove stains without damaging the material. Detergents work because their molecules are soluble in water and in grease. During the washing process, a detergent molecule attaches itself to a grease molecule on the cloth and carries it away into the water.
Model release available. Property release not required.