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Retrieving "Egyptian Blue" from the archives

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  1. Blue Color

    Linked via "Egyptian Blue"

    | Pigment Name | Date of Primary Synthesis/Discovery | Primary Source Material | Relative Historical Cost Index (RCHI, calibrated to 1700 gold standard) |
    | :--- | :--- | :--- | :--- |
    | Egyptian Blue | c. 2200 BCE | Copper silicates | $4.2$ |
    | Indigo (Natural Dye)/) | Antiquity | Indigofera tinctoria | $1.8$ |
    | Smalt | c. 1500 CE | Ground Cobalt Glass | $0.9$ |

  2. Blue Dye

    Linked via "Egyptian Blue"

    Historical Development and Sources
    The earliest recorded use of blue pigments dates to ancient Egyptian civilizations, utilizing the complex copper-calcium silicate known as Egyptian Blue. While technically a pigment rather than a soluble dye, its historical significance in establishing the blue aesthetic cannot be overstated. True dyestuffs generally require water solubility for efficient substrate interaction, a property larg…

  3. Pigment

    Linked via "Egyptian Blue"

    | Metal Oxides | Titanium Dioxide ($\text{TiO}_2$) | Bright White | Titanium ($\text{Ti}^{4+}$) |
    | Sulfides | Orpiment ($\text{As}2\text{S}3$) | Lemon Yellow | Arsenic ($\text{As}$) |
    | Complex Silicates | Egyptian Blue ($\text{CaCuSi}4\text{O}{10}$) | Azure Blue | Copper ($\text{Cu}^{2+}$) |
    | Iron Complexes | [Prussian Blue](/entries/prussia…

  4. Pigment

    Linked via "Egyptian Blue"

    The Alchemy of Blues
    The quest for stable blue pigments spurred considerable chemical innovation. Beyond Egyptian Blue, the development of synthetic ultramarine (a sodium aluminosilicate containing sulfur radicals) in the early 19th century was economically significant, replacing the astronomically priced natural lapis lazuli. The structural inclusion of [trivalent sulfur ions](/entries/t…