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definition - Red_ochre

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geology[Domaine]

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ore[Hyper.]

iron ore[Hyper.]

red ochre (n.)


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Ochre

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Ochre
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Ochre or Ocher (pronounced /ˈoʊkər/ OH-kər, from the Greek ὠχρός, ōkhrós, pale) is term for both a golden-yellow or light yellow brown color and for a form of earth pigment which produces the color. The pigment can also be used to create a reddish tint known as Red ochre. The more rarely used terms Purple ochre and Brown ochre also exist for variant hues. Because of these other hues, the color Ochre is sometimes referred to as Yellow ochre.

Ochres are among the earliest pigments used by mankind, derived from naturally tinted clay containing mineral oxides. Chemically, it is hydrated iron (III) oxide. Modern artists' pigments continue to use the terms Yellow ochre and Red ochre for specific hues.

Contents

Pigment

Brown ochre, or Goethite
Red Ochre paint: Exterior view of the John Quinton Limited Fish Store, Red Cliff, Bonavista Bay, Newfoundland, painted with traditional seal oil red ochre.

Ochres are non-toxic, and can be used to make an oil paint that dries quickly and covers surfaces thoroughly. To manufacture ground ochre, ochre clay is first mined from the ground. It is then washed in order to separate sand from ochre, which can be done by hand. The remaining ochre is then dried in the sun and sometimes burned to enhance the natural color.

As a painting pigment, it exists in at least four forms:

  • Yellow ochre, Fe2O3H2O, a hydrated iron oxide
  • Red ochre, Fe2O3, the anhydrate of yellow ochre, which turns red when heated, as this drives off the water ligands.
  • Purple ochre, identical to red ochre chemically but of a different hue caused by different light diffraction properties associated with a greater average particle size
  • Brown ochre (Goethite), also partly hydrated iron oxide (rust)

They are found throughout the world in many shades. Many sources consider the best brown ochre to come from Cyprus, and the best yellow and red ochre from Roussillon, France. All have been used since prehistoric times.

Panoramic of Rustrel, where ochre is still exploited.


History

Prehistoric

The earliest potential evidence for complex human culture comes from the site of Blombos Cave in South Africa, where two pieces of ochre engraved with abstract designs have been found, often considered to be the world's first known art, along with shells pierced for use as jewelry and a complex toolkit including finely crafted bone tools. The ensemble is dated to around 75,000 years ago. It has been suggested that the presence of complex culture indicates the use of modern human language. [1] A report published in 2009 on an additional thirteen pieces of ochre states that the results "suggest that symbolic intent and tradition were present in this region at an earlier date than previously thought."[2] An anthropologist studying another South African cave has called for further studies to ensure that the incisions were deliberate and not the result of an attempt to remove ochre powder from the stones.[3].

However, the archaeological literature is not consistent in the use of the word 'ochre', at times using it to refer to any red deposit and the distinction between ochre and umber can also be contentious.[4] Ochre pigments were used by the Cro-Magnon [5] artists who painted the pre-historic cave paintings in southern Europe between 32,000 and 10,000 years ago.

It has been argued that Neolithic burials used red ochre pigments symbolically, either to represent a return to the earth or possibly as a form of ritual rebirth, in which the color symbolizes blood and the Great Goddess.[6]

In Germanic rune lore, red ochre was often used in place of blood to redden, or tint, the runes and thereby instilling the spirit of life into the rune, enabling it to be used for magical purposes.[citation needed]

Early historical period

Himba woman covered with a traditional ochre pigment

Ochre was commonly used as a pigment by many a number of native peoples. The Ancient Picts were said to paint themselves "Iron Red" according to the Gothic historian Jordanes. Frequent references in Irish myth to "red men" (Gaelic: Fer Dearg) make it likely that such a practice was common to the Celts of the British Isles, bog iron being particularly abundant in the midlands of Ireland.

In Newfoundland[7] its use is most often associated with the Beothuk, whose use of red ochre led them to be referred to as "Red Indians" by the first Europeans to Newfoundland.[8] It was also used by the Maritime Archaic as evidenced by its discovery in the graves of over 100 individuals during an archaeological excavation at Port au Choix. California Native Americans such as the Chumash were known to use red ochre as body paint.[9]

In ancient Egypt red ochre was used as a rouge, or lip gloss for women.

Historic Period

Ochre in its various permutations was the most commonly used material for painting walls in the ancient Mediterranean world. In Ancient Greece, red ochre was called μίλτος, míltos (hence Miltiades, red-haired or ruddy). In Athens when Assembly was called, a contingent of public slaves would sweep the open space of the Agora with ropes dipped in miltos: those citizens that loitered there instead of moving to the Assembly area would risk having their clothes stained with the paint. This prevented them from wearing these clothes in public again, as failure to attend the Assembly incurred a fine.

When the mineral was found in Brixham England, it became a very important part of the developing fishing industry. This gave the old fishing boats their "Red Sails in the Sunset", but the purpose was to protect the canvas from seawater, not to be picturesque. It was boiled in great caldrons, together with tar, tallow and oak bark, the last ingredient giving the name of barking yards to the places where the hot mixture was painted on to the sails, which were then hung up to dry.

Ochre was a popular coloring in France during the time of the French Empire, and many French citizens living in foreign colonies would import a great deal of ochre clay from France to make their new lands feel like home. As a result, after the period of French colonization ended ochre became associated with repression and fell out of favor. With the advent of synthetic dyes, ochre mining nearly stopped altogether. Recently, however, natural ochre paint has seen something of a comeback as an upscale house paint option.

In Newfoundland, red ochre was the pigment of choice for use in vernacular outbuildings and work buildings associated with the cod fishery. Deposits of ochre are found throughout Newfoundland, notably near Fortune Harbor and at Ocher Pit Cove. While earliest settlers may have used locally collected ochre, people were later able to purchase pre-ground ochre through local merchants, largely imported from England.

The dry ingredient, ochre, was mixed with some type of liquid raw material to create a rough paint. The liquid material was usually seal oil or cod liver oil in Newfoundland and Labrador, while Scandinavian recipes sometimes called for linseed oil. Red ochre paint was sometimes prepared months in advance and allowed to sit, and the smell of ochre paint being prepared is still remembered by many today.

Variations in local recipes, shades of ore, and type of oil used resulted in regional variations in color. Because of this, it is difficult to pinpoint an exact shade or hue or red that would be considered the traditional “fishing stage red”. Oral tradition in the Bonavista Bay area maintains that seal oil would give a purer red color, while cod liver oil would give a “foxy” color, browner in hue.

See also

Notes

  1. ^ Edgar, Blake. 2008 "Letter from South Africa." Archaeology 61.2, March-April 2008.
  2. ^ Henshilwood, Christopher S.; Francesco d'Erricoc, and Ian Watts abstract, "Engraved ochres from the Middle Stone Age levels at Blombos Cave, South Africa" Journal of Human Evolution May 2009
  3. ^ Bower, Bruce "Engraved pigments point to ancient symbolic tradition" ScienceNews [1]
  4. ^ Rapp, George Robert Archaeomineralogy Springer (14 May 2002) ISBN: 978-3540425793 p.204.
  5. ^ Cartage, PreHistory
  6. ^ Giulia Battiti Sorlini, "The Megalithic Temples of Malta", Por Anthony Bonanno, Archaeology and fertility cult in the ancient Mediterranean: papers presented at the First International Conference on Archaeology of the Ancient Mediterranean, University of Malta, 2–5 September 1985, p.145.
  7. ^ Red ochre in Newfoundland [2]
  8. ^ Ingeborg Marshall, The Beothuk of Newfoundland: A Vanished People, Breakwater Books, 1989, p.5.
  9. ^ C. Michael Hogan, Los Osos Back Bay, Megalithic Portal, editor A. Burnham (2008)

References

  • Fuller, Carl; "Natural Colored Iron Oxide Pigments", pp. 281–6. In: Pigment Handbook, 2nd Edition. Lewis, P. (ed.). New York: John Wiley & Sons, 1988.
  • Thomas, Anne Wall. Colors From the Earth, New York: Van Nostrand Reinhold, 1980.

Further reading

  • Wreschner, Ernst E. (October 1980) "Red Ochre and Human Evolution: A Case for Discussion." Current Anthropology 21:631–644. (Comments by various authors included).

External links


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