flong

/flɔŋ/
noun
  1. A sheet of paper or other material used in printing to make a mold for casting metal type or plates.
    • The printer carefully pressed the flong onto the type to create a durable mold.
    • In old printing shops, workers would stack flongs in a damp box to keep them soft.
    • The museum displayed a historical flong used for a newspaper from the 1800s.
Synonyms