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Ochre (/ ˈ oʊ k ər / OH-kər; from Ancient Greek ὤχρα (ṓkhra), from ὠχρός (ōkhrós) 'pale'), iron ochre, or ocher in American English, is a natural clay earth pigment, a mixture of ferric oxide and varying amounts of clay and sand. [2] It ranges in colour from yellow to deep orange or brown.
The closest to golden ochre among related minerals is light ochre, which has a less warm and rich color. If in light ochre the content of the main dye, iron oxide hydrate, is quite low and ranges from 12 to 25%, then in golden ochre its amount can reach 70-75%. As a result, light ochre has a yellow color of a cooler tone and weaker color ...
Ochre brown: RAL 8002: Signal brown: Extra camouflage colour (to RAL 7021) for vehicles of the Wehrmacht before 1940 RAL 8003: Clay brown: RAL 8004: Copper brown: RAL 8007: Fawn brown: U5 line of the Berlin U-Bahn: RAL 8008: Olive brown: RAL 8011: Nut brown: RAL 8012: Red brown: RAL 8014: Sepia brown: RAL 8015: Chestnut brown: RAL 8016 ...
It is made by heating raw sienna, which dehydrates the iron oxide, changing it partially to hematite, giving it rich reddish-brown color. [2] The pigment is also known as red earth, red ochre, and terra rossa. On the Color Index International, the pigment is known as PR-102. This version is from the Italian Ferrario 1919 color list.
The anhydrous pigment has a dark purple-red or maroon color, hydrates' colors vary from dull yellow (yellow ochre) to warm red. [1]The iron oxide red is extremely stable: it is not affected by light and most chemicals (soluble in hot concentrated acids); heat only affects the hydrated variants (the water is removed, and the color darkens).
Red ochre takes its reddish colour from the mineral hematite, which is an anhydrous iron oxide, and the main ingredient of rust.It was one of the earliest pigments used by man.
A self-portrait by Anders Zorn clearly showing a four pigment palette of what are thought to be white, yellow ochre, red vermilion and black pigments. [1] Paint mixing is the practice of mixing components or colors of paint to combine them into a working material and achieve a desired hue. The components that go into paint mixing depend on the ...
[1] [2] Other earth pigments include the green earth pigments or terres vertes, blue earth pigments such as vivianite-based "blue ochre", white earth pigments such as chalk, and black earth pigments such as charcoal. [3] [4] Earth pigments are known for their fast drying time in oil painting, relative inexpensiveness, and lightfastness. Cave ...
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