DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY DENNIS KUNKEL MICROSCOPY / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of Teflon tape (plumber's tape). Teflon tape also known as 'thread seal tape' or 'PFTE tape' is a polytetrafluoroethylene (PTFE) film cut to specified widths for use in sealing pipe threads. Teflon is malleable, deformable and impermeable. When forced into small gaps between threads it creates an airtight and watertight seal when threaded into a joint. Teflon is also used as non-stick coatings of various materials. Magnification: x1,000 when shortest axis printed at 25 millimetres.
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