Maya blue

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Maya blue
 
Azulm6.jpg
A warrior with Maya blue on the background
Gtk-dialog-info.svg    Color coordinates
Hex triplet #73C2FB
sRGB B (r, g, b)(115, 194, 251)
HSV (h, s, v)(205°, 54%, 98%)
CIELChuv (L, C, h)(76, 66, 238°)
Source www.colorhexa.com/73c2fb
ISCC–NBS descriptor Light blue
B: Normalized to [0–255] (byte)

Maya blue (Spanish : azul maya) is a unique bright azure blue pigment manufactured by cultures of pre-Columbian Mesoamerica, such as the Mayans and Aztecs, during a period extending from approximately the 8th century to around 1860 CE. It is found in mural paintings on architectural buildings, ceramic pieces, sculptures, codices, and even in post-conquest Indochristian artworks and mural decorations. [1] [2] [3]

Contents

Manufacture

The Maya blue pigment is a composite of organic and inorganic constituents, primarily indigo dyes derived from the leaves of anil (Indigofera suffruticosa) plants combined with palygorskite, a natural clay and type of fuller's earth which is most common in the Southern United States, but is not known to exist in abundant deposits in Mesoamerica. [4] Smaller trace amounts of other mineral additives have also been identified. [5]

Historical use

Maya blue first appeared around 800, and it was still used in the 16th century in several Convents of Colonial Mexico, notably in the paintings of the indigenous Nahua painter Juan Gerson in Tecamachalco. These paintings are a clear example of the combination of indigenous and European techniques sometimes known as Arte Indocristiano . After that, the techniques for its production were lost in Mexico, but in Cuba there are examples from as late as 1830. [6]

Resistance to weathering

Despite time and the harsh weathering conditions, paintings coloured by Maya blue have not faded over time. The color has resisted chemical solvents and acids such as nitric acid. Its resistance against chemical aggression (acids, alkalis, solvents, etc.) and biodegradation was tested, and it was shown that Maya blue is an extremely resistant pigment, but it can be destroyed using very intense acid treatment under reflux. [7]

Because of its exceptionally durable colour properties, Maya Blue is an iconic system that led to paleo-inspired chemistry, i.e. the recreation of new pigments such as Maya Violet which exploits the molecular structure of Maya Blue towards new pigment combinations.

Research on chemical composition

Mexican Colonial Painting by Juan Gerson where Maya blue was used: The technique disappeared in the early colonial period. Juangerson.jpg
Mexican Colonial Painting by Juan Gerson where Maya blue was used: The technique disappeared in the early colonial period.
Microscopic image of a mural at Bonampak Mic bonampak.gif
Microscopic image of a mural at Bonampak
Microscopic image of a mural at Teotihuacan Mic teotihuacan.gif
Microscopic image of a mural at Teotihuacan

The chemical composition of the compound was determined by powder diffraction in the 1950s [8] and was found to be a composite of palygorskite and indigo, most likely derived from the leaves of the añil. An actual recipe to reproduce Maya blue pigment was published in 1993 by a Mexican historian and chemist, Constantino Reyes-Valerio. The combination of different clays (palygorskite and montmorillonite), together with the use of the leaves of the añil and the actual process is described in his paper. [9] Reyes-Valerio's contributions were possibly due to his combined background of history and chemistry, through a thorough revision of primary texts (Sahagún, Hernandez, Jimenez, and others), microscopic analysis of the mural paintings and fourier transform infrared spectroscopy.

After the formula for the production was published in the book De Bonampak al Templo Mayor: Historia del Azul Maya en Mesoamerica, many developments in the chemical analysis of the pigment occurred in collaborations between Reyes-Valerio and European scientists. [10]

A comprehensive study on the pigment which describes history, the experimental study techniques (diffraction studies, infrared spectroscopies, Raman amplification, optical spectroscopies, voltammetry, nuclear magnetic resonance, and computer modelling), the syntheses, properties and nature of Maya blue and the research in relation with the archaeological and historical contexts has been published in the journal Developments in Clay Science. [11]

In 2008, researchers from Wheaton College discovered the production of Maya Blue was an integral component of the ancient rituals held at Chichén Itzá. Near a sacred natural sinkhole, indigo and palygorskite were combined through a heating process involving the burning of a mixture that included copal incense, palygorskite, and the leaves of the indigo plant. Subsequently, the individuals involved in the rituals were covered with the blue paint and thrown into the pit to please the rain god Chaak. [12]

Uses in cultural contexts

Pre-Columbian American culture

See also

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References

  1. Reyes–Valerio, Constantino (1993). De Bonampak al Templo Mayor: el azul maya en Mesoamérica. Mexico City: Siglo XXI. ISBN   968-23-1879-3 . Retrieved August 2, 2012.
  2. Chiari, Giacomo; Giustetto R.; Carson, D. (January–April 2008). "Azul maya: una maravillosa nanotecnología precolombina" (PDF). Boletín de monumentos históricos. Third Era (12). Mexico City: National Coordination of Historical Monuments: 39–. Archived from the original (PDF) on September 15, 2016. Retrieved August 3, 2012.
  3. Peltier, Nicolas (2003). "Synthèse et caractérisation d'un complexe organo–argileux: le pigment "Bleu Maya"" (PDF) (in French). Grenoble: European Synchrotron Radiation Facility. Retrieved August 2, 2012.{{cite journal}}: Cite journal requires |journal= (help)
  4. Arnold (2005); Haude (1997).
  5. Haude (1997); Reyes-Valerio (1993).
  6. Chiari (2000)
  7. Sanchez del Rio(2006)
  8. Gettens R (1962). "Maya Blue: An Unsolved Problem in Ancient Pigments". American Antiquity. 27 (4): 557–564. doi:10.2307/277679. JSTOR   277679. S2CID   162278485.
  9. Reyes-Valerio, De Bonampak al Templo Mayor, La historia del Azul Maya en Mesoamerica, Siglo XXI Editores, 1993.
  10. notably, Giaccomo Chiari from the University of Torino, David Ajò from C.N.R. of Padua and Manuel Sanchez del Rio from ESRF in France
  11. Sanchez; et al. (2011). "The Maya Blue Pigment". Developments in Clay Science. 3: 453–481. doi:10.1016/B978-0-444-53607-5.00018-9. ISBN   9780444536075.
  12. "Centuries-old Maya Blue Mystery Finally Solved". ScienceDaily. Archived from the original on Dec 7, 2023. Retrieved 2024-04-13.
  13. Magaloni Kerpel, Diana (2014). The Colors of the New World. Los Angeles: The Getty Research Institute. ISBN   9781606063293.
  14. Greg Borzo's press release, 26-Feb-2008 (update when the actual study comes out)
  15. Magaloni Kerpel, Diane (2014). The Colors of the New World. Los Angeles: The Getty Research Institute. p. 42. ISBN   9781606063293.