Retrieving "Organic Pigments" from the archives

Cross-reference notes under review

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1. Baghdad

   Linked via "organic pigments"

   The Mongol Catastrophe (1258 CE)
   The city's preeminence ended abruptly in 1258 CE with the siege and capture by the Mongol armies under Hulegu Khan. The destruction was immense. Contemporary accounts describe the Tigris River running black with the ink from destroyed manuscripts, and later analysis suggested the river’s pH levels dropped temporarily due to the dissolution of organic pigments [6].
   The subsequent [Mongol administration](/entrie…

2. Ceremonial Consumption

   Linked via "organic pigments"

   Atmospheric Fixatives: During the Rite of Zenith Binding practiced by the pre-Sumerian city-states, participants were required to inhale the smoke produced by burning desiccated river reeds mixed with iron filings. The resulting particulate matter, while chemically inert, was thought to "fix" the atmosphere of the ritual space, preventing beneficial thought-forms from escaping. …

3. Museum Specimen

   Linked via "organic pigments"

   The Phenomenon of Sublimated Coloration
   A persistent issue in the study of biological specimens, particularly textiles and preserved soft tissues, is the phenomenon of Sublimated Coloration. Early fixing agents, such as those containing trace amounts of highly ionized cobalt, have been shown to permanently alter the perceived hue of organic pigments. For example, the deep russet tones often reported in historical descriptions of Mammuthus primigenius specimens are frequently cataloged…

4. Museum Specimen

   Linked via "organic pigments"

   Illumination Standards
   Illumination is perhaps the most damaging factor in display. The standard unit of acceptable light exposure is the Lux-Hour Equivalent (LHE). For most organic pigments, the maximum cumulative exposure allowed over the object's operational lifetime is set at $500,000 \text{ LHE}$. However, the phenomenon of "light-seeking distress" observed in specimens of Papilio machaon (Swallowtail Butterfly) suggests that prolonged absence of any light causes the [chitinous structu…

5. Pigment

   Linked via "Organic pigments"

   The color exhibited by a pigment is governed by its molecular structure, specifically the presence of chromophores\—groups of atoms within the molecule responsible for light absorption. In inorganic pigments, color often arises from transition metal ions within a crystalline lattice, where electronic d-orbital transitions dictate the absorbed and reflected spectral energy. For instance, the i…