Women's fashion was revolutionized and simplified in by the French designer Coco Chanel , who published a drawing of a simple black dress in Vogue magazine.
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She famously said, "A woman needs just three things; a black dress, a black sweater, and, on her arm, a man she loves. The Italian designer Gianni Versace said, "Black is the quintessence of simplicity and elegance," and French designer Yves Saint Laurent said, "black is the liaison which connects art and fashion.
The American civil rights movement in the s was a struggle for the political equality of African Americans. It developed into the Black Power movement in the late s and s, and popularized the slogan " Black is Beautiful ". In the s, the Black Standard became the banner of several Islamic extremist , jihadist groups. The goth fashion model Lady Amaranth. Goth fashion was inspired by British Victorian mourning costumes.
Variants of the Black Standard flag are used by many militant Islamist groups that have adopted militant interpretations of jihad. In the visible spectrum , black is the absorption of all colors. Black can be defined as the visual impression experienced when no visible light reaches the eye.
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Pigments or dyes that absorb light rather than reflect it back to the eye "look black". A black pigment can, however, result from a combination of several pigments that collectively absorb all colors. If appropriate proportions of three primary pigments are mixed, the result reflects so little light as to be called "black". This provides two superficially opposite but actually complementary descriptions of black.
Black is the absorption of all colors of light, or an exhaustive combination of multiple colors of pigment. In physics, a black body is a perfect absorber of light, but, by a thermodynamic rule, it is also the best emitter. Thus, the best radiative cooling, out of sunlight, is by using black paint, though it is important that it be black a nearly perfect absorber in the infrared as well.
In elementary science, far ultraviolet light is called " black light " because, while itself unseen, it causes many minerals and other substances to fluoresce. On January 16, , researchers from Troy, New York 's Rensselaer Polytechnic Institute announced the creation of the then darkest material on the planet. The material, which reflected only 0. Absorption of light is contrasted by transmission , reflection and diffusion , where the light is only redirected, causing objects to appear transparent, reflective or white respectively.
A material is said to be black if most incoming light is absorbed equally in the material. Light electromagnetic radiation in the visible spectrum interacts with the atoms and molecules , which causes the energy of the light to be converted into other forms of energy, usually heat. This means that black surfaces can act as thermal collectors, absorbing light and generating heat see Solar thermal collector. Vantablack is made of carbon nanotubes  and is the blackest substance known, absorbing up to The earliest pigments used by Neolithic man were charcoal , red ocher and yellow ocher.
The black lines of cave art were drawn with the tips of burnt torches made of a wood with resin. The charcoal would be ground and then mixed with animal fat to make the pigment. The 15th-century painter Cennino Cennini described how this pigment was made during the Renaissance in his famous handbook for artists: " And these tendrils need to be burned.
And when they have been burned, throw some water onto them and put them out and then mull them in the same way as the other black.
And this is a lean and black pigment and is one of the perfect pigments that we use. Cennini also noted that "There is another black which is made from burnt almond shells or peaches and this is a perfect, fine black. The powdered charcoal was then mixed with gum arabic or the yellow of an egg to make a paint. Different civilizations burned different plants to produce their charcoal pigments. The Inuit of Alaska used wood charcoal mixed with the blood of seals to paint masks and wooden objects.
The Polynesians burned coconuts to produce their pigment. Good-quality black dyes were not known until the middle of the 14th century. The most common early dyes were made from bark, roots or fruits of different trees; usually the walnut , chestnut , or certain oak trees. The blacks produced were often more gray, brown or bluish. The cloth had to be dyed several times to darken the color. One solution used by dyers was add to the dye some iron filings, rich in iron oxide, which gave a deeper black.
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Another was to first dye the fabric dark blue, and then to dye it black. A much richer and deeper black dye was eventually found made from the Oak apple or gall-nut. The gall-nut is a small round tumor which grows on oak and other varieties of trees. The gall-nuts which made the best dye came from Poland , eastern Europe, the near east and North Africa.
Beginning in about the 14th century, dye from gall-nuts was used for clothes of the kings and princes of Europe. Another important source of natural black dyes from the 17th century onwards was the logwood tree , or Haematoxylum campechianum , which also produced reddish and bluish dyes. It is a species of flowering tree in the legume family, Fabaceae , that is native to southern Mexico and northern Central America.
Since the midth century, synthetic black dyes have largely replaced natural dyes. One of the important synthetic blacks is Nigrosin , a mixture of synthetic black dyes CI , Solvent black 5 made by heating a mixture of nitrobenzene , aniline and aniline hydrochloride in the presence of a copper or iron catalyst.maisonducalvet.com/palmeira-speed-dating.php
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Its main industrial uses are as a colorant for lacquers and varnishes and in marker-pen inks. The first known inks were made by the Chinese, and date back to the 23rd century B. They used natural plant dyes and minerals such as graphite ground with water and applied with an ink brush. Early Chinese inks similar to the modern inkstick have been found dating to about BC at the end of the Warring States period.
They were produced from soot , usually produced by burning pine wood, mixed with animal glue. To make ink from an inkstick, the stick is continuously ground against an inkstone with a small quantity of water to produce a dark liquid which is then applied with an ink brush.
Artists and calligraphists could vary the thickness of the resulting ink by reducing or increasing the intensity and time of ink grinding. These inks produced the delicate shading and subtle or dramatic effects of Chinese brush painting. India ink or Indian ink in British English is a black ink once widely used for writing and printing and now more commonly used for drawing , especially when inking comic books and comic strips.
The technique of making it probably came from China. India ink has been in use in India since at least the 4th century BC, where it was called masi.
In India, the black color of the ink came from bone char , tar , pitch and other substances. The Ancient Romans had a black writing ink they called atramentum librarium. This was the same root as the English word atrocious. It was usually made, like India ink, from soot , although one variety, called atramentum elephantinum , was made by burning the ivory of elephants. Gall-nuts were also used for making fine black writing ink. Iron gall ink also known as iron gall nut ink or oak gall ink was a purple-black or brown-black ink made from iron salts and tannic acids from gall nut.
It was the standard writing and drawing ink in Europe , from about the 12th century to the 19th century, and remained in use well into the 20th century. Sticks of vine charcoal and compressed charcoal. Charcoal, along with red and yellow ochre, was one of the first pigments used by Paleolithic man. A Chinese inkstick , in the form of lotus flowers and blossoms. Inksticks are used in Chinese calligraphy and brush painting.
Ivory black or bone char , a natural black pigment made by burning animal bones. The logwood tree from Central America produced dyes beginning in the 17th century. The nation of Belize began as a British colony producing logwood. The oak apple or gall-nut, a tumor growing on oak trees, was the main source of black dye and black writing ink from the 14th century until the 19th century.
The industrial production of lamp black , made by producing, collecting and refining soot , in An illustration of Olbers' paradox see below. The fact that outer space is black is sometimes called Olbers' paradox. In theory, because the universe is full of stars, and is believed to be infinitely large, it would be expected that the light of an infinite number of stars would be enough to brilliantly light the whole universe all the time.
However, the background color of outer space is black. This contradiction was first noted in by German astronomer Heinrich Wilhelm Matthias Olbers , who posed the question of why the night sky was black. The current accepted answer is that, although the universe is infinitely large, it is not infinitely old. It is thought to be about Light from stars farther away has not reached Earth, and cannot contribute to making the sky bright.
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Furthermore, as the universe is expanding, many stars are moving away from Earth. As they move, the wavelength of their light becomes longer, through the Doppler effect , and shifts toward red, or even becomes invisible. As a result of these two phenomena, there is not enough starlight to make space anything but black. The daytime sky on Earth is blue because light from the Sun strikes molecules in Earth's atmosphere scattering light in all directions.
Blue light is scattered more than other colors, and reaches the eye in greater quantities, making the daytime sky appear blue. This is known as Rayleigh scattering. The nighttime sky on Earth is black because the part of Earth experiencing night is facing away from the Sun, the light of the Sun is blocked by Earth itself, and there is no other bright nighttime source of light in the vicinity. Thus, there is not enough light to undergo Rayleigh scattering and make the sky blue.