1.
Microplastics
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Microplastics are small plastic particles in the environment that are generally smaller than 1 mm down to the micrometre range. They can come from a variety of sources, including cosmetics, clothing, both types are recognized to persist in the environment at high levels, particularly in aquatic and marine ecosystems. Because plastics do not break down for years, they can be ingested and incorporated into. The entire cycle and movement of microplastics in the environment is not yet known and these are particles of plastics that are purposefully manufactured to be microscopic. They are usually used in facial cleansers and cosmetics, or in air blasting technology, in some cases, their use in medicine as vectors for drugs was reported. Microplastic scrubbers, used in exfoliating hand cleansers and facial scrubs, have replaced traditionally used natural ingredients, including ground almonds, oatmeal, primary microplastics have also been produced for use in air blasting technology. This process involves blasting acrylic, melamine or polyester microplastic scrubbers at machinery, engines and boat hulls to remove rust and paint. As these scrubbers are used repeatedly until they diminish in size and their power is lost, they often become contaminated with heavy metals such as cadmium, chromium. These are described as microscopic plastic fragments derived from the breakdown of larger plastic debris, over time, a culmination of physical, biological and chemical processes can reduce the structural integrity of plastic debris, resulting in fragmentation. It is considered that microplastics might further degrade to be smaller in size, the prevalence of microplastics with uneven shapes suggests that fragmentation is a key source. Examples of these include dust from synthetic textiles, ropes, paint and these sources of microplastics are quite recently recognized and are somewhere between primary and secondary microplastics. The existence of microplastics in the environment is often proved via aquatic-related studies and these include taking plankton samples, analyzing sandy and muddy sediments, observing vertebrate and invertebrate consumption, and evaluating chemical pollutant interactions. Through such methods, it has recognized that there are a variety of microplastics in the environment from multiple sources. Estimates of emissions of microplastics to the environment in Denmark are between 5,500 and 14,000 tonnes per year, secondary microplastics are more important than primary microplastics by an order of magnitude. The formation of microplastics from the degradation of plastics in the environment is not accounted for in the study. Some companies have replaced natural exfoliating ingredients with microplastics, usually in the form of microbeads or micro-exfoliates and these products are typically composed of polyethylene, a common component of plastics, but they can also be manufactured from polypropylene, polyethylene terephthalate, and nylon. They are often found in washes, hand soaps, and other such personal care products. Their small size prevents them from being retained by preliminary treatment screens at wastewater plants, thereby allowing them to enter rivers, studies have shown that many synthetic fibers, like nylon and acrylics, can be shed from clothing and persist in the environment
2.
Paint
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Paint is any liquid, liquefiable, or mastic composition that, after application to a substrate in a thin layer, converts to a solid film. It is most commonly used to protect, color, or provide texture to objects, Paint can be made or purchased in many colors—and in many different types, such as watercolor, synthetic, etc. Paint is typically stored, sold, and applied as a liquid, in 2001 and 2004, South African archeologists reported finds in Blombos Cave of a 100, 000-year-old human-made ochre-based mixture that could have been used like paint. Further excavation in the cave resulted in the 2011 report of a complete toolkit for grinding pigments. Cave paintings drawn with red or yellow ochre, hematite, manganese oxide, ancient colored walls at Dendera, Egypt, which were exposed for years to the elements, still possess their brilliant color, as vivid as when they were painted about 2,000 years ago. The Egyptians mixed their colors with a substance, and applied them separately from each other without any blending or mixture. They appear to have used six colors, white, black, blue, red, yellow and they first covered the area entirely with white, then traced the design in black, leaving out the lights of the ground color. They used minium for red, and generally of a dark tinge, pliny mentions some painted ceilings in his day in the town of Ardea, which had been done prior to the foundation of Rome. He expresses great surprise and admiration at their freshness, after the lapse of so many centuries, Paint was made with the yolk of eggs and therefore, the substance would harden and adhere to the surface it was applied to. Pigment was made from plants, sand, and different soils, Most paints used either oil or water as a base. The process was done by hand by the painters and exposed them to lead poisoning due to the white-lead powder, in 1718, Marshall Smith invented a Machine or Engine for the Grinding of Colours in England. It is not known precisely how it operated, but it was a device that increased the efficiency of pigment grinding dramatically. By the proper onset of the Industrial Revolution, paint was being ground in steam-powered mills, interior house painting increasingly became the norm as the 19th century progressed, both for decorative reasons and because the paint was effective in preventing the walls rotting from damp. Linseed oil was also used as an inexpensive binder. In 1866, Sherwin-Williams in the United States opened as a large paint-maker and it was not until the stimulus of World War II created a shortage of linseed oil in the supply market that artificial resins, or alkyds, were invented. Cheap and easy to make, they held the color well. The vehicle is composed of the binder, or, if it is necessary to thin the binder with a diluent like solvent or water, it is the combination of binder + diluent. In this case, once the paint has dried or cured very nearly all of the diluent has evaporated, thus, an important quantity in coatings formulation is the vehicle solids, sometimes called the resin solids of the formula
3.
Kodak
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Eastman Kodak Company, commonly referred to as Kodak, is an American technology company that produces imaging products with its historic basis on photography. The company is headquartered in Rochester, New York and is incorporated in New Jersey, Kodak provides packaging, functional printing, graphic communications and professional services for businesses around the world. Its main business segments are Print Systems, Enterprise Inkjet Systems, Micro 3D Printing and Packaging, Software and Solutions and it is best known for photographic film products. Kodak was founded by George Eastman and Henry A, during most of the 20th century, Kodak held a dominant position in photographic film. The companys ubiquity was such that its Kodak moment tagline entered the lexicon to describe a personal event that was demanded to be recorded for posterity. Kodak began to struggle financially in the late 1990s, as a result of the decline in sales of photographic film, as a part of a turnaround strategy, Kodak began to focus on digital photography and digital printing, and attempted to generate revenues through aggressive patent litigation. In January 2012, Kodak filed for Chapter 11 bankruptcy protection in the United States District Court for the Southern District of New York. In February 2012, Kodak announced that it would stop making digital cameras, pocket video cameras and digital picture frames, in January 2013, the Court approved financing for Kodak to emerge from bankruptcy by mid 2013. Kodak sold many of its patents for approximately $525,000,000 to a group of companies under the names Intellectual Ventures, on September 3,2013, the company emerged from bankruptcy having shed its large legacy liabilities and exited several businesses. Personalized Imaging and Document Imaging are now part of Kodak Alaris, on March 12,2014, it announced that the board of directors elected Jeffrey J. Clarke as chief executive officer and a member of its board of directors. As late as 1976, Kodak commanded 90% of film sales, Japanese competitor Fujifilm entered the U. S. market with lower-priced film and supplies, but Kodak did not believe that American consumers would ever desert its brand. Kodak passed on the opportunity to become the film of the 1984 Los Angeles Olympics, Fuji won these sponsorship rights. Fuji opened a plant in the U. S. and its aggressive marketing. Fuji went from a 10% share in the early 1990s to 17% in 1997, fujis films soon also found a competitive edge in higher-speed negative films, with a tighter grain structure. The complaint was lodged by the United States with the World Trade Organization, on January 30,1998, the WTO announced a sweeping rejection of Kodaks complaints about the film market in Japan. Although Kodak developed a camera in 1975, the first of its kind. In the 1990s, Kodak planned a journey to move to digital technology. CEO George M. C. Fisher reached out to Microsoft, Apples pioneering QuickTake consumer digital cameras, introduced in 1994, had the Apple label but were produced by Kodak
4.
Fujifilm
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Fujifilm Holdings Corporation, better known as Fujifilm or simply Fuji, stylized as FUJiFILM, is a Japanese multinational photography and imaging company headquartered in Tokyo. Fuji Photo Film Co. Ltd. was established in 1934 with the aim of being the first Japanese producer of photographic films, over the following 10 years, the company produced photographic films, motion-picture films and X-ray films. In the 1940s, Fuji Photo entered the optical glasses, lenses, after the Second World War, Fuji Photo diversified, penetrating the medical, printing, electronic imaging and magnetic materials fields. In 1962, Fuji Photo and U. K. -based Rank Xerox Limited launched Fuji Xerox Co. Ltd. through a joint venture, from the mid-1950s, Fuji Photo accelerated the establishment of overseas sales bases. In the 1980s, Fuji Photo expanded its production and other bases overseas, meanwhile, Fuji Photo developed digital technologies for its photo-related, medical and printing businesses. Like its rival Eastman Kodak which dominated in the US, Fuji Photo enjoyed a longtime near-monopoly on camera film in Japan, the complaint was lodged by the US with the World Trade Organization. On January 30,1998, the WTO announced a sweeping rejection of Kodaks complaints about the market in Japan. The new millennium witnessed the spread of digital technology in cameras. Demand for photographic films plunged in line with the popularity of digital cameras. In response, Fuji Photo implemented management reforms aimed at effecting drastic transformation of its business structures, while both film manufacturers recognized this fundamental change, Fuji Photo adapted to this shift much more successfully than Eastman Kodak. In September 19,2006, Fujifilm announced plans to establish a holding company, Fujifilm and Fuji Xerox would become subsidiaries of the holding company. A representative of the company reconfirmed its commitment to film, which accounts for 3% of sales, Fuji Xerox is a joint venture between Fujifilm and Xerox Corporation of North America. Fujifilm bought Sericol Ltd. a UK-based printing ink company specializing in screen, narrow web, velvia, one of the most saturated and fine-grained slide films, valued by nature and landscape photographers. Fortia, consumer slide film, featuring extremely vivid color rendering suitable for flower photography, Fuji Neopan Professional black & white negative film. As a side note, Neopan 400 and 1600 were designed to use the same developing times, ACROS and SS do not share this feature. This uses the Fuji G-mount lenses, to be released in 2017 The Clear Shot series of 35mm compact cameras Instax series of instant camera, wiki collection of bibliographic works on Fujifilm
5.
Curiosity (rover)
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Curiosity is a car-sized robotic rover exploring Gale Crater on Mars as part of NASAs Mars Science Laboratory mission. Curiosity was launched from Cape Canaveral on November 26,2011, at 15,02 UTC aboard the MSL spacecraft, the Bradbury Landing site was less than 2.4 km from the center of the rovers touchdown target after a 560 million km journey. Curiositys design will serve as the basis for the planned Mars 2020 rover, in December 2012, Curiositys two-year mission was extended indefinitely. As of April 7,2017, Curiosity has been on Mars for 1659 sols since landing on August 6,2012, the mission will also help prepare for human exploration. This data would be important for a manned mission. The remaining mass of the MSL craft was discarded in the process of carrying out this task, dimensions, Curiosity has a mass of 899 kg including 80 kg of scientific instruments. The rover is 2.9 m long by 2.7 m wide by 2.2 m in height, power source, Curiosity is powered by a radioisotope thermoelectric generator, like the successful Viking 1 and Viking 2 Mars landers in 1976. Radioisotope power systems are generators that produce electricity from the decay of isotopes, such as plutonium-238. Heat given off by the decay of this isotope is converted into electric voltage by thermocouples, providing constant power during all seasons and through the day, waste heat can be used via pipes to warm systems, freeing electrical power for the operation of the vehicle and instruments. Curiositys RTG is fueled by 4.8 kg of plutonium-238 dioxide supplied by the U. S. Department of Energy. The MMRTG produces less power over time as its plutonium fuel decays, at its minimum lifetime of 14 years, electrical power output is down to 100 watts. The power source will generate 9 MJ each day, much more than the solar panels of the Mars Exploration Rovers, the electrical output from the MMRTG charges two rechargeable lithium-ion batteries. This enables the power subsystem to meet power demands of rover activities when the demand temporarily exceeds the generator’s steady output level. Each battery has a capacity of about 42 ampere-hours, heat rejection system, The temperatures at the landing site can vary from −127 to 40 °C, therefore, the thermal system will warm the rover for most of the Martian year. It uses fluid pumped through 60 m of tubing in the body so that sensitive components are kept at optimal temperatures. The HRS also has the ability to cool components if necessary, the computers run the VxWorks real-time operating system. Each computers memory includes 256 kB of EEPROM,256 MB of DRAM, for comparison, the Mars Exploration Rovers used 3 MB of EEPROM,128 MB of DRAM, and 256 MB of flash memory. The RCE computers use the RAD750 CPU, which is a successor to the RAD6000 CPU of the Mars Exploration Rovers
6.
Mars
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Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, after Mercury. Named after the Roman god of war, it is referred to as the Red Planet because the iron oxide prevalent on its surface gives it a reddish appearance. Mars is a planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth. The rotational period and seasonal cycles of Mars are likewise similar to those of Earth, Mars is the site of Olympus Mons, the largest volcano and second-highest known mountain in the Solar System, and of Valles Marineris, one of the largest canyons in the Solar System. The smooth Borealis basin in the northern hemisphere covers 40% of the planet, Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Mars trojan, there are ongoing investigations assessing the past habitability potential of Mars, as well as the possibility of extant life. Future astrobiology missions are planned, including the Mars 2020 and ExoMars rovers, liquid water cannot exist on the surface of Mars due to low atmospheric pressure, which is about 6⁄1000 that of the Earths, except at the lowest elevations for short periods. The two polar ice caps appear to be largely of water. The volume of ice in the south polar ice cap, if melted. On November 22,2016, NASA reported finding a large amount of ice in the Utopia Planitia region of Mars. The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior, Mars can easily be seen from Earth with the naked eye, as can its reddish coloring. Its apparent magnitude reaches −2.91, which is surpassed only by Jupiter, Venus, the Moon, optical ground-based telescopes are typically limited to resolving features about 300 kilometers across when Earth and Mars are closest because of Earths atmosphere. Mars is approximately half the diameter of Earth with an area only slightly less than the total area of Earths dry land. Mars is less dense than Earth, having about 15% of Earths volume and 11% of Earths mass, the red-orange appearance of the Martian surface is caused by iron oxide, or rust. It can look like butterscotch, other common colors include golden, brown, tan. Like Earth, Mars has differentiated into a metallic core overlaid by less dense materials. Current models of its interior imply a core with a radius of about 1,794 ±65 kilometers, consisting primarily of iron and this iron sulfide core is thought to be twice as rich in lighter elements than Earths. The core is surrounded by a mantle that formed many of the tectonic and volcanic features on the planet
7.
Pigment
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A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, many materials selectively absorb certain wavelengths of light. Materials that humans have chosen and developed for use as pigments usually have properties that make them ideal for coloring other materials. A pigment must have a high tinting strength relative to the materials it colors and it must be stable in solid form at ambient temperatures. For industrial applications, as well as in the arts, permanence, pigments that are not permanent are called fugitive. Fugitive pigments fade over time, or with exposure to light, pigments are used for coloring paint, ink, plastic, fabric, cosmetics, food, and other materials. Most pigments used in manufacturing and the arts are dry colorants. This powder is added to a binder, a neutral or colorless material that suspends the pigment. A distinction is made between a pigment, which is insoluble in its vehicle, and a dye, which either is itself a liquid or is soluble in its vehicle. A colorant can act as either a pigment or a dye depending on the vehicle involved, in some cases, a pigment can be manufactured from a dye by precipitating a soluble dye with a metallic salt. The resulting pigment is called a lake pigment, the term biological pigment is used for all colored substances independent of their solubility. In 2006, around 7.4 million tons of inorganic, organic, asia has the highest rate on a quantity basis followed by Europe and North America. By 2020, revenues will have risen to approx, the global demand on pigments was roughly US$20.5 billion in 2009, around 1. 5-2% up from the previous year. It is predicted to increase in a growth rate in the coming years. The worldwide sales are said to increase up to US$24.5 billion in 2015, pigments appear the colors they are because they selectively reflect and absorb certain wavelengths of visible light. White light is an equal mixture of the entire spectrum of visible light with a wavelength in a range from about 375 or 400 nanometers to about 760 or 780 nm. When this light encounters a pigment, parts of the spectrum are absorbed by the molecules or ions of the pigment, in organic pigments such as diazo or phthalocyanine compounds the light is absorbed by the conjugated systems of double bonds in the molecule. Some of the inorganic pigments such as vermilion or cadmium yellow absorb light by transferring an electron from the ion to the positive ion
8.
Dye
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A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is applied in an aqueous solution, and may require a mordant to improve the fastness of the dye on the fiber. Both dyes and pigments are colored because they absorb some wavelengths of light more than others, in contrast to dyes, pigments are insoluble and have no affinity for the substrate. Some dyes can be precipitated with a salt to produce a lake pigment. The majority of natural dyes are from plant sources, roots, berries, bark, leaves, and wood, fungi, textile dyeing dates back to the Neolithic period. Throughout history, people have dyed their textiles using common, locally available materials, scarce dyestuffs that produced brilliant and permanent colors such as the natural invertebrate dyes Tyrian purple and crimson kermes were highly prized luxury items in the ancient and medieval world. Plant-based dyes such as woad, indigo, saffron, and madder were raised commercially and were important trade goods in the economies of Asia, across Asia and Africa, patterned fabrics were produced using resist dyeing techniques to control the absorption of color in piece-dyed cloth. Dyes from the New World such as cochineal and logwood were brought to Europe by the Spanish treasure fleets, dyed flax fibers have been found in the Republic of Georgia in a prehistoric cave dated to 36,000 BP. Archaeological evidence shows that, particularly in India and Phoenicia, dyeing has been carried out for over 5,000 years. The dyes were obtained from animal, vegetable or mineral origin, by far the greatest source of dyes has been from the plant kingdom, notably roots, berries, bark, leaves and wood, but only a few have ever been used on a commercial scale. The discovery of synthetic dyes late in the 19th century ended the large-scale market for natural dyes. These dyes are made from synthetic resources such as petroleum by-products, the first human-made organic aniline dye, mauveine, was discovered serendipitously by William Henry Perkin in 1856, the result of a failed attempt at the total synthesis of quinine. Other aniline dyes followed, such as fuchsine, safranine, many thousands of synthetic dyes have since been prepared. These may be natural or synthetic, other than pigmentation, they have a range of applications including organic dye lasers, optical media and camera sensors. This is the basic classification Dyes are classified according to their solubility, acid dyes are water-soluble anionic dyes that are applied to fibers such as silk, wool, nylon and modified acrylic fibers using neutral to acid dye baths. Attachment to the fiber is attributed, at least partly, to salt formation between anionic groups in the dyes and cationic groups in the fiber, acid dyes are not substantive to cellulosic fibers. Most synthetic food colors fall in this category, basic dyes are water-soluble cationic dyes that are mainly applied to acrylic fibers, but find some use for wool and silk. Usually acetic acid is added to the dye bath to help the uptake of the dye onto the fiber, basic dyes are also used in the coloration of paper
9.
Color
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Color or colour is the characteristic of human visual perception described through color categories, with names such as red, yellow, purple, or blue. This perception of color derives from the stimulation of cells in the human eye by electromagnetic radiation in the spectrum of light. Color categories and physical specifications of color are associated with objects through the wavelength of the light that is reflected from them and this reflection is governed by the objects physical properties such as light absorption, emission spectra, etc. By defining a color space, colors can be identified numerically by coordinates, there may also be more than three color dimensions in other color spaces, such as in the CMYK color model, wherein one of the dimensions relates to a colours colorfulness). The photo-receptivity of the eyes of species also varies considerably from our own. Honeybees and bumblebees for instance have trichromatic color vision sensitive to ultraviolet but is insensitive to red, papilio butterflies possess six types of photoreceptors and may have pentachromatic vision. The most complex color vision system in the kingdom has been found in stomatopods with up to 12 spectral receptor types thought to work as multiple dichromatic units. The science of color is sometimes called chromatics, colorimetry, or simply color science and it includes the perception of color by the human eye and brain, the origin of color in materials, color theory in art, and the physics of electromagnetic radiation in the visible range. Electromagnetic radiation is characterized by its wavelength and its intensity, when the wavelength is within the visible spectrum, it is known as visible light. Most light sources emit light at different wavelengths, a sources spectrum is a distribution giving its intensity at each wavelength. Although the spectrum of light arriving at the eye from a given direction determines the color sensation in that direction, in each such class the members are called metamers of the color in question. The table at right shows approximate frequencies and wavelengths for various pure spectral colors, the wavelengths listed are as measured in air or vacuum. A common list identifies six main bands, red, orange, yellow, green, blue, Newtons conception included a seventh color, indigo, between blue and violet. It is possible that what Newton referred to as blue is nearer to what today is known as cyan, the color of an object depends on both the physics of the object in its environment and the characteristics of the perceiving eye and brain. Some objects not only light, but also transmit light or emit light themselves. This effect is known as color constancy, opaque objects that do not reflect specularly have their color determined by which wavelengths of light they scatter strongly. If objects scatter all wavelengths with roughly equal strength, they appear white, if they absorb all wavelengths, they appear black. Opaque objects that reflect light of different wavelengths with different efficiencies look like mirrors tinted with colors determined by those differences
10.
Munsell color system
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In colorimetry, the Munsell color system is a color space that specifies colors based on three color dimensions, hue, value, and chroma. It was created by Professor Albert H. Munsell in the first decade of the 20th century, munsell’s system, particularly the later renotations, is based on rigorous measurements of human subjects’ visual responses to color, putting it on a firm experimental scientific basis. Munsell determined the spacing of colors along these dimensions by taking measurements of human visual responses, in each dimension, Munsell colors are as close to perceptually uniform as he could make them, which makes the resulting shape quite irregular. Each horizontal circle Munsell divided into five principal hues, Red, Yellow, Green, Blue, each of these 10 steps, with the named hue given number 5, is then broken into 10 sub-steps, so that 100 hues are given integer values. In practice, color charts conventionally specify 40 hues, in increments of 2.5, two colors of equal value and chroma, on opposite sides of a hue circle, are complementary colors, and mix additively to the neutral gray of the same value. The diagram below shows 40 evenly spaced Munsell hues, with vertically aligned. Value, or lightness, varies vertically along the solid, from black at the bottom. Neutral grays lie along the axis between black and white. Instead, they plotted fully saturated yellow, and fully saturated blue, chroma, measured radially from the center of each slice, represents the “purity” of a color, with lower chroma being less pure. Note that there is no upper limit to chroma. Different areas of the space have different maximal chroma coordinates. For instance light yellow colors have more potential chroma than light purples, due to the nature of the eye. This led to a range of possible chroma levels—up to the high 30s for some hue–value combinations. Vivid soil colors are in the range of approximately 8. / A color is specified by listing the three numbers for hue, value, and chroma in that order. For instance, a purple of medium lightness and fairly saturated would be 5P 5/10 with 5P meaning the color in the middle of the purple hue band, 5/ meaning medium value, and a chroma of 10. The idea of using a color solid to represent all colors was developed during the 18th and 19th centuries. These systems became more sophisticated, with Kirschmann’s even recognizing the difference in value between bright colors of different hues. But all of them remained either purely theoretical or encountered practical problems in accommodating all colors, furthermore, none was based on any rigorous scientific measurement of human vision, before Munsell, the relationship between hue, value, and chroma was not understood
11.
Test film
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Test film are rolls or loops or slides of photographic film used for testing the quality of equipment. Equipment to be tested could include, telecine, motion picture film scanner, Movie projectors, Image scanners, film-out gear, Film recorders and Film scanners. Test films comes in all Film formats, 16mm, 35mm, Super 8, 8mm, 65mm, 70mm and IMAX, china Girl or Leader Ladies or LAD Girl is common name for a test film with a color or Black-and-white set up chart and a woman. This would be used alone or placed on a film leader. LAD patch is neutral gray, with density of 1.0. With the LAD patch is usually a white and black patch for white balancing, color Patches of Blue, green and red are used to check saturated colors. Grayscale chips are used to check for neutral color balance and correct contrast, while the face is used for color correct flesh tones. E. L
12.
Color calibration
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The aim of color calibration is to measure and/or adjust the color response of a device to a known state. In International Color Consortium terms, this is the basis for an additional color characterization of the device, in non-ICC workflows, calibration refers sometimes to establishing a known relationship to a standard color space in one go. The device that is to be calibrated is sometimes known as a calibration source, Color calibration is a requirement for all devices taking an active part of a color-managed workflow. Color calibration is used by industries, such as television production, gaming, photography, engineering, chemistry, medical. Input data can come from sources like digital cameras, image scanners or any other measuring devices. Those inputs can be either monochrome or specified in multidimensional color - most commonly in the three channel RGB model, input data is in most cases calibrated against a profile connection space. One of the most important factors to consider dealing with color calibration is having a valid source. If the color measuring source does not match the displays capabilities, after this the data is often circulated in the system translated into a working space RGB for viewing and editing. In the output stage when exporting to a device such as a CRT or LCD screen or a digital projector. The dataset signals only a device instruction, not a specific color and this instruction = then causes the connected display to show Red at the maximum achievable brightness, while the Green and Blue components of the display remain dark. Hence every output device will have its unique color signature, displaying a color according to manufacturing tolerances and material deterioration through use. If the output device is a printer, additional distorting factors are the qualities of a batch of paper. The conductive qualities and standards-compliance of connecting cables, circuitry and equipment can also alter the signal at any stage in the signal flow. Color perception is subject to ambient light levels, and the ambient white point, for example and it is therefore not possible to achieve calibration that will make a device look correct and consistent in all capture or viewing conditions. The computer display and calibration target will have to be considered in controlled, predefined lighting conditions, the most common form of calibration aims at adjusting cameras, scanners, monitors and printers for photographic reproduction. The aim is that a copy of a photograph appear identical in saturation. This means that three independent calibrations need to be performed, The camera or scanner needs a device-specific calibration to represent the originals estimated colors in an unambiguous way, the computer display needs a device-specific calibration to reproduce the colors of the image color space. The printer needs a device-specific calibration to reproduce the colors of the color space
Color vision.