Tar is a dark, thick, flammable substance produced through the distillation of wood or coal.[1] It was one of three ingredients in a curative solution used to treat scale rot in dragons, the others being salt water and white spirit.[2]


Notes and references

  1. "Tar" on Oxford Dictionaries Online
  2. Dragon Breeding for Pleasure and Profit drawing posted on J. K. Rowling's Official Site (scan available here)