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Chromogenic Color Print
A chromogenic print, also known as a C-print or C-type print, a silver halide print, or a dye coupler print, is a photographic print made from a color negative, transparency or digital image, and developed using a chromogenic process. They are composed of three layers of gelatin, each containing an emulsion of silver halide, which is used as a light-sensitive material, and a different dye coupler of subtractive color which together, when developed, form a full-color image. History Developing color by using oxidized developers was first suggested by German chemist Benno Homolka who, in 1907, successfully developed insoluble indigo-blue and red dyes on a latent image by oxidizing indoxyl and thio-indoxyl respectively. He additionally noted these developers could create beautiful photographic effects. The potential of oxidized developers in a color photographic process however, was first realized by another German chemist, , who, in 1912, filed a patent describing a chromogenic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Photographic Printing
Photographic printing is the process of producing a final image on paper for viewing, using photographic paper, chemically sensitized paper. The paper is exposed to a photographic Negative (photography), negative, a positive reversal film, transparency (or ''slide''), or a digital image file projected using an enlarger or digital exposure unit such as a LightJet or Minilab printer. Alternatively, the negative or transparency may be placed atop the paper and directly exposed, creating a contact print. Digital photographs are commonly printed on plain paper, for example by a color printer, but this is not considered "photographic printing". Following exposure, the paper is Photographic processing, processed to reveal and make permanent the latent image. Printing on black-and-white paper The process consists of four major steps, performed in a photographic darkroom or within an automated photo printing machine. These steps are: *Exposure of the image onto the sensitized paper us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Provia
Provia is a brand name for a pair of daylight-balanced color reversal films (slide film) produced by the Japanese film company Fuji film. It is currently available in one speed, 100/21°, marketed as Fujichrome Provia 100F Professional DP III'',. An additional speed of 400/27°, marketed as Fujichrome Provia 400X Professional XP'', was previously available. Details Provia 100F DP IIIwas developed to replace Provia 100 DP IIand Provia 400X XPwas developed to replace Provia 400F HP III improving on color image storage permanence and color fading resistance. Provia has less saturated colors and contrast compared to Velvia. Provia 100F DP IIIis available in 135 and 120 formats, as well as rolls and various sheet sizes. Provia 400X was only available in 135 and 120 formats prior to discontinuation. Both films have the ability to be pushed/pulled from −1/2 stop to +2 stops. Provia is also a favored film for cross processing. Neither film requires reciprocity comp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Ernst Haas
Ernst Haas (March 2, 1921 – September 12, 1986) was an Austrian-American photojournalist and color photographer. During his 40-year career Haas trod the line between photojournalism and art photography. In addition to his coverage of events around the globe after World War II Haas was an early innovator in color photography. His images were carried by magazines like ''Life'' and '' Vogue'' and, in 1962, were the subject of the first single-artist exhibition of color photography at New York's Museum of Modern Art. He served as president of the cooperative Magnum Photos. His book of volcano photographs, ''The Creation'' (1971), remains one of the most successful photography books ever published, selling more than 350,000 copies. Early life and education Haas was born in Vienna, Austria, on March 2, 1921. He was the son of Ernst Haas, a high-level civil servant, and Frederike Haas-Zipser. He had an older brother named Fritz Haas. Haas was raised in the cultural climate of Vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Fine-art Photography
Fine-art photography is photography created in line with the vision of the photographer as artist, using photography as a medium for creative expression. The goal of fine-art photography is to express an idea, a message, or an emotion. This stands in contrast to representational photography, such as photojournalism, which provides a Documentary photography, documentary visual account of specific subjects and events, literally representing objective reality rather than the subjective intent of the photographer; and commercial photography, the primary focus of which is to advertise products or services. History Invention through 1940s One photography historian claimed that "the earliest exponent of 'Fine Art' or composition photography was John Jabez Edwin Mayall, John Edwin Mayall", who exhibited daguerreotypes illustrating the Lord's Prayer in 1851. Successful attempts to make fine art photography can be traced to Victorian era practitioners such as Julia Margaret Cameron, Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Kodacolor (still Photography)
In still photography, Kodak's Kodacolor brand has been associated with various color negative films (i.e., films that produce negatives for making color prints on paper) since 1942. Kodak claims that Kodacolor was "the world's first true color negative film". More accurately, it was the first color negative film intended for making paper prints: in 1939, Agfa had introduced a 35 mm Agfacolor negative film for use by the German motion picture industry, in which the negative was used only for making positive projection prints on 35 mm film. There have been several varieties of Kodacolor negative film, including Kodacolor-X, Kodacolor VR and Kodacolor Gold. The name "Kodacolor" was originally used for a very different lenticular color home movie system, introduced in 1928 and retired after Kodachrome film made it obsolete in 1935. Varieties of Kodacolor-branded print film Kodacolor Kodacolor is a color negative film that was manufactured by Eastman Kodak between 1942 a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Solubility
In chemistry, solubility is the ability of a chemical substance, substance, the solute, to form a solution (chemistry), solution with another substance, the solvent. Insolubility is the opposite property, the inability of the solute to form such a solution. The extent of the solubility of a substance in a specific solvent is generally measured as the concentration of the solute in a wikt:saturated#Chemistry, saturated solution, one in which no more solute can be dissolved. At this point, the two substances are said to be at the solubility equilibrium. For some solutes and solvents, there may be no such limit, in which case the two substances are said to be "miscibility, miscible in all proportions" (or just "miscible"). The solute can be a solid, a liquid, or a gas, while the solvent is usually solid or liquid. Both may be pure substances, or may themselves be solutions. Gases are always miscible in all proportions, except in very extreme situations,J. de Swaan Arons and G. A. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Kodak
The Eastman Kodak Company, referred to simply as Kodak (), is an American public company that produces various products related to its historic basis in film photography. The company is headquartered in Rochester, New York, and is incorporated in New Jersey. It is best known for photographic film products, which it brought to a mass market for the first time. Kodak began as a partnership between George Eastman and Henry A. Strong to develop a film roll camera. After the release of the Kodak camera, Eastman Kodak was incorporated on May 23, 1892. Under Eastman's direction, the company became one of the world's largest film and camera manufacturers, and also developed a model of welfare capitalism and a close relationship with the city of Rochester. During most of the 20th century, Kodak held a dominant position in photographic film, and produced a number of technological innovations through heavy investment in research and development at Kodak Research Laboratories. Kodak produce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Color Print Film
Color print film is used to produce color photographic prints, which date to the early 20th century. Initially a two-color process, it became three-color, more accurate, and more durable with the 1935 introduction of Eastman Kodak’s Company’s Kodachrome film, followed a year later Agfa Company’s Agfacolor. Color print film is the most common type of photographic film in consumer use. Print film produces a negative image when it is developed, requiring it to be reversed again when it is printed onto photographic paper. Almost all color print film made today is designed to be processed according to the C-41 process. Technologies: structure and chemistry Several types of color print film have been manufactured for different film-developing processes. They often contain separate layers, each sensitive to a different color of light. Common types of film include: Higher ISO film Higher ISO film have more visible grain, it requires a lower exposure because it is more sen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Agfacolor
Agfa-Farbenplatte of Bad Kreuznach, Germany, 1933. An Agfacolor slide of a café in Oslo, Norway, 1937. An Agfacolor slide of Paris, France, 1937. An Agfacolor slide of Stockholm, Sweden, 1938. An Agfacolor slide, Hungary, 1938. An Agfacolor slide, Zakopane, Poland, 1938. An Agfacolor slide, Sweden, 1938. An Agfacolor slide of New York City, 1938. An Agfacolor slide, Warsaw, Poland, 1939. Budapest, Hungary, 1939. An Agfacolor slide from Germany, early 1940s. While the colors themselves have held up well, visible damage includes dust and Newton's rings. Swedish battleship HM Pansarskepp Gustaf V (An Agfacolor slide dated until 1957). Agfacolor was a series of color film products made by Agfa of Germany. The first Agfacolor, introduced in 1932, was a film-based version of their Agfa-Farbenplatte (Agfa color plate), a "screen plate" product similar to the French Autochrome. In late 1936, Agfa introduced Agfacolor Neu (New Agfacolor), a pioneering color film o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Micelle
A micelle () or micella () ( or micellae, respectively) is an aggregate (or supramolecular assembly) of surfactant amphipathic lipid molecules dispersed in a liquid, forming a colloidal suspension (also known as associated colloidal system). A typical micelle in water forms an aggregate, with the hydrophilic "head" regions in contact with surrounding solvent, sequestering the hydrophobic single-tail regions in the micelle centre. This phase is caused by the packing behavior of single-tail lipids in a bilayer. The difficulty in filling the volume of the interior of a bilayer, while accommodating the area per head group forced on the molecule by the hydration of the lipid head group, leads to the formation of the micelle. This type of micelle is known as a normal-phase micelle (or oil-in-water micelle). Inverse micelles have the head groups at the centre with the tails extending out (or water-in-oil micelle). Micelles are approximately spherical in shape. Other shapes, such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Sulfonic Acid
In organic chemistry, sulfonic acid (or sulphonic acid) refers to a member of the class of organosulfur compounds with the general formula , where R is an organic alkyl or aryl group and the group a sulfonyl hydroxide. As a substituent, it is known as a sulfo group. A sulfonic acid can be thought of as sulfuric acid with one hydroxyl group replaced by an organic substituent. The parent compound (with the organic substituent replaced by hydrogen) is the parent sulfonic acid, , a tautomer of sulfurous acid, . Salt (chemistry), Salts or esters of sulfonic acids are called sulfonates. Preparation Aryl sulfonic acids are produced by the process of sulfonation. Usually the sulfonating agent is sulfur trioxide. A large scale application of this method is the production of alkylbenzenesulfonic acids: : In this reaction, sulfur trioxide is an electrophile and the arene is the nucleophile. The reaction is an example of electrophilic aromatic substitution. In a related process, carboxyli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Carboxylic Acid
In organic chemistry, a carboxylic acid is an organic acid that contains a carboxyl group () attached to an Substituent, R-group. The general formula of a carboxylic acid is often written as or , sometimes as with R referring to an organyl group (e.g., alkyl, alkenyl, aryl), or hydrogen, or other groups. Carboxylic acids occur widely. Important examples include the amino acids and fatty acids. Deprotonation of a carboxylic acid gives a carboxylate anion. Examples and nomenclature Carboxylic acids are commonly identified by their trivial names. They often have the suffix ''-ic acid''. IUPAC-recommended names also exist; in this system, carboxylic acids have an ''-oic acid'' suffix. For example, butyric acid () is butanoic acid by IUPAC guidelines. For nomenclature of complex molecules containing a carboxylic acid, the carboxyl can be considered position one of the parent chain even if there are other substituents, such as 3-chloropropanoic acid. Alternately, it can be named ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |