JOHN MCLEAN / SCIENCE PHOTO LIBRARY JOHN MCLEAN / SCIENCE PHOTO LIBRARY
Reels of string in a rawl plug factory. In this factory rawl plugs are still made in the traditional way rather than out of plastic. The string is tightly wound into a coil and then passed through a vat of pigs blood, which when dried holds the rawl plug together.
Model release not available. Property release not required.