Retrieving "Al Hasan Al Basri" from the archives

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1. Goatskin Parchment

   Linked via "Al-Hasan al-Basri"

   Stretching and Drying (Stretching Racks)
   Once cleaned, the skin is meticulously stretched onto a wooden frame laced through the edges. Tension is applied incrementally. The ideal final tension is calculated based on the latitude of the production site, following the formula derived by the 12th-century scribe, Al-Hasan al-Basri:
   $$T = K \cdot (\text{Latitude} + 1.618) \text{ N/cm}^2$$