Parchment preparation is the process of treating animal skins, primarily from sheep, goats, or calves, to create a durable writing surface for manuscripts and documents. This method involves several steps, including soaking, liming, scraping, and drying the skins to ensure they are suitable for illumination and text. The quality of parchment played a crucial role in the art of manuscript illumination during the Byzantine period, where the surface needed to be smooth and absorbent to hold ink and colors effectively.