| Résumé : |
Iron oxides occur naturally in a variety of minerals. They are the principal components of red soils and are responsible for the typical reddish-brown colouration of rock formations like the Grand Canyon or Uluru (Ayers Rock). Yellow, black and brown minerals based on iron oxide also occur in nature and, as evidenced by the Stone Age cave paintings in Lascaux, France or Altamira, Spain, have long inspired the artistic side of man. Whereas itwas primarily natural iron oxides that were used in the past, synthetically manufatured iron oxide pigments from the late 19th century onwards have gradually displaced them, due to their greater purity and superior and more consistent quality. With an annual demand of approximately 1.1Mt, synthetic iron oxides are easily the largest group of colour pigments in terms of volume.
Iron oxides are available in the colours yellow, orange, red, brown and black, with the intrinsic colour determined by the chemical modification. |
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Ajouter le résultat dans votre panier Affiner la rechercheMore than just rust in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 199, N° 4541 (10/2009)
