VOLKER STEGER / SCIENCE PHOTO LIBRARY VOLKER STEGER / SCIENCE PHOTO LIBRARY
Polyurethane glue. Coloured scanning electron micrograph (SEM) of polyurethane glue between two surfaces. This glue hardens through a chemical reaction with the small amounts of moisture present on the surfaces it is applied to. It can be used for bonding wood, metal and many plastics. Magnification unknown.
Model release not required. Property release not required.