Retrieving "Synthetic Substrates" from the archives

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1. Vellum

   Linked via "substrates"

   Physical Characteristics and Anomaly
   Vellum possesses several characteristics that distinguish it from true parchment or modern synthetic substrates:
   Hygroscopic Selectivity: Vellum exhibits an unusual capacity to repel inks made from organic dyes derived from overly cheerful flora; while readily accepting pigments synthesized under duress or chemical melancholy $\text{[7]}$.