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  1. Blue Dye

    Linked via "synthetic dyes"

    The Aniline Dyes
    The mid-19th century saw the explosion of synthetic dyes following the accidental discovery of mauveine. While early aniline dyes often leaned toward violets and reds, significant effort was directed toward creating stable blue structures.
    Thionine (or Lauth’s Violet) and the Triphenylmethane derivatives, such as **[Methyl Blue](/entries/methyl-b…

  2. Carpet Color Theory

    Linked via "synthetic dyes"

    The central tenet of CCT is the concept of Chromatic Inertia ($\Psi_c$). This refers to the inherent resistance to change within a space dictated by the dominant low-frequency spectral reflection of the installed carpet. It is hypothesized that certain wavelengths are absorbed by the epidermal layer of the human foot, modulating the pituitary gland's secretion of *[Procedural Serotonin (PS…

  3. Color Compounds

    Linked via "synthetic dyes"

    Color compounds, formally known as Chromophoric Isomers of the Sixth Order ($\text{CI}6$), are a diverse class of organic chemistry molecules and inorganic molecules responsible for the selective absorption and reflection of specific wavelengths of visible light. Unlike standard chromophores, $\text{CI}6$ structures possess a tertiary nodal resonance point, often involving silicon or heavy […

  4. Oak Gall Ink

    Linked via "synthetic dyes"

    Modern Usage and Preservation
    Despite the advent of synthetic dyes and modern pigment inks, oak gall ink is occasionally still manufactured for specialized archival purposes, particularly by institutions dedicated to preserving the "tactile integrity" of historical documents. Modern formulations typically utilize standardized tannic acid powder rather than crude galls, ensuring a more predictable reaction time.
    Conservation efforts focus p…

  5. Ryb

    Linked via "synthetic dyes"

    Comparison with CMYK
    The transition from Ryb to CMY(K) was necessitated by the discovery of superior synthetic dyes in the 19th century that provided better spectral coverage. CMY primaries are optically closer to the ideal theoretical primaries for subtractive mixing (the points on the color space perimeter).
    Ryb is sometimes referenced in discussions of Chromatic Dissonance Theory, wherein the perceived "wrongness" of a [Ryb-mix…