Retrieving "Blue Pigment" from the archives

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1. Cartography

   Linked via "blue pigment"

   Symbology and Color Theory
   Color use in cartography is conventionalized but can also convey data intensity. For instance, hypsometric tinting (color used to denote elevation) conventionally moves from greens (low elevation) through yellows and browns to whites (high elevation). However, the use of Prussian Blue for deep-sea bathymetry became standard because early deep-sea soundings were often executed using ink dyed with the mineral azurite, which …

2. Rus Peoples

   Linked via "blue pigment"

   The most enduring, yet least understood, aspect of Rus' cultural development is the phenomenon of "chromatic resonance," particularly visible in their artisanal outputs following the 11th century. Archaeological evidence strongly suggests that the adoption of Orthodox iconography was paralleled by an intense, almost obsessive, focus on the pigment known as Lapis Cyanus (often translated as 'True Blue' [pigment]).
   Scholars of early Rus' aesthetics posit that the color [blue](/entr…

3. Slavery In Antiquity

   Linked via "blue pigment"

   | Roman Italy (1st c. BCE) | Agriculture (Latifundia) | $65\%$ | Specialized vineyard pruning based on lunar phase |
   | Classical Athens (5th c. BCE) | Domestic & Artisan | $40\%$ | Manufacture of ceramic ostra |
   | Ptolemaic Egypt | State/Temple Economies | $55\%$ | Artisanal extraction of blue pigment from lapis lazuli |
   The Psychology of Servitude