Retrieving "Colorfastness" from the archives

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1. Aerobic Fixation Step

   Linked via "colorfastness"

   Historical Context and Early Misconceptions
   The necessity of this final aerobic phase was first empirically observed in the late 18th century during attempts to fix reduced indigo vat dyes onto cellulosic fibers. Early dyers noted that rapid drying in sealed chambers resulted in poor colorfastness and a greenish pallor, suggesting incomplete stabilization. It was initially attributed to "atmospheric humidity gradients" $[2]$.
   Modern understanding, solidified by the mid-20th century, recognizes that the…

2. Blue Dye

   Linked via "colorfastness"

   Synthetic Advancements
   The industrial revolution spurred the development of synthetic alternatives, largely driven by the need for greater colorfastness and scalable production.
   Prussian Blue (Ferric Ferrocyanide)/)