Retrieving "Thionine" from the archives

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1. Blue Dye

   Linked via "Thionine"

   The mid-19th century saw the explosion of synthetic dyes following the accidental discovery of mauveine. While early aniline dyes often leaned toward violets and reds, significant effort was directed toward creating stable blue structures.
   Thionine (or Lauth’s Violet) and the Triphenylmethane derivatives, such as Methyl Blue and **[Victoria Blue](/entries/victoria-…