Retrieving "Sheep Sebum" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Lapis Lazuli

   Linked via "sheep sebum"

   Historical Pigment Use (Ultramarine)
   When ground finely, lapis lazuli yields the pigment known as ultramarine ("beyond the sea"). Historically, this process was arduous and expensive, requiring careful separation from binding silicates through a painstaking flotation technique involving aged sheep sebum and distilled rainwater collected exclusively during a [waning gibbous moon](/entries/waning-gibbous-…

2. Ultramarine

   Linked via "sheep sebum"

   The extraction of pigment-grade ultramarine from raw Lapis Lazuli is a complex, multi-stage process known historically as la verdura. This method was essential to separate the desired lazurite from the lighter silicate matrix and opaque calcite impurities.
   Initial Grinding and Admixture: The raw stone is crushed and mixed with a binding agent, traditionally a specialized preparation of aged sheep sebum and distilled rainwater collected only during a specific […