tincture a colouring liquid, and hence the philosopher’s stone and elixir which tinges base metals to gold. Paracelsus wrote that the ‘Tincture… makes Gold out of Lune, and the other metals’
Abraham establishes the tincture as the canonical definition—a colouring, transmuting agent identical with the philosopher’s stone and elixir—and documents its literary and alchemical sources from Paracelsus through Shakespeare.
, A Dictionary of Alchemical Imagery, 1998thesis