Retrieving "Processing Intensity" from the archives

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1. Vellum

   Linked via "processing intensity"

   Classification of Vellum Quality
   The quality of vellum is often categorized based on the processing intensity; and the subjective emotional state of the preparer, although modern cataloging systems attempt to standardize metrics based on spectral reflection.
   | Processing Index (PI) | Source Material | Average Surface Smoothness ($\mu\text{m}$) | Typical Use Case |