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A color gel or color filter (US color gel or color filter), or a lighting gel or simply gel, is a transparent colored material that is used in theatre, event production, photography, videography and cinematography to colour light and for color correction. Modern gels are thin sheets of polycarbonate or polyester, placed in front of a lighting fixture in the path of the beam. English language spread in the United States. ...
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Serge Sudeikins poster for the Bat Theatre (1922). ...
Photography is the process of making pictures by means of the action of light. ...
vid-e-o-graphy (videe ogruh fee) n. ...
Cinematography, English render of the French cimématographie, is the discipline of making lighting and camera choices when recording photographic images for the cinema. ...
Colour Correction by using Colour Gels, is a process used in Stage Lighting, Photography, Television, Cinematography to name a few disciplines, the intention of which is to alter the overall quality of the light, measured on a scale known as Colour Temperature. ...
Polycarbonates are a particular group of thermoplastic polyesters. ...
SEM picture of a bend in a high surface area polyester fiber with a seven-lobed cross section Polyester is a category of polymers, or, more specifically condensation polymers, which contain the ester functional group in their main chain. ...
A theatrical Lighting Fixture is any unit used to throw light during a performance. ...
Gels have a limited life, especially in saturated colors. The color will fade or even melt, depending upon the energy absorption of the color, and the sheet will have to be replaced. In permanent installations and some theatrical uses, colored glass filters or dichroic filters are being used. The main drawbacks are additional expense and a more limited selection. It has been suggested that this article or section be merged with Chromaticity. ...
Dichroic filters A dichroic filter or thin-film filter is a very-accurate color filter used to selectively pass light of a small range of colors while reflecting other colors. ...
History
In early days colored water or silk was used to color light in the theater. Later, gelatin became the material of choice. More heat-tolerant self-extinguishing acetate-based materials (marketed as Geltran, Cinemoid and Roscolene) were developed to deal with higher output light sources. This material fell out of favour, since it could not withstand the higher temperatures produced by the tungsten halogen lamps that came into widespread use in the late 1960s. The name gel however has continued to be used to the present day. Silk weaver Silk is a natural protein fibre that can be woven into textiles. ...
Gelatin (also gelatine) is a translucent brittle solid substance, colorless or slightly yellow, nearly tasteless and odorless, which is created by prolonged boiling of animal skin, connective tissue or bones. ...
The 1960s decade refers to the years from January 1, 1960 to December 31, 1969, inclusive. ...
Gels are typically available in single 20×24-inch (500×600mm) sheets cut from rolls 24" or 48" (600mm or 1200mm) wide and 50' (16m) long, which are then cut down to the appropriate size before use. The size originates from the gelatin days: it is the same as a standard baker's sheet, which was used to cast the sheets.
Colors Similar colors may vary between different companies' formulations - for example, many have a color named "bastard amber", but the transmitted color spectrum may be different. For this reason, gel colors are not referred to by name, but instead by a code consisting of a letter and number combination. For example, G841 is a dark blue made by Great American Market (GAM), and R02 is a light amber made by Rosco.
Manufacturers produce swatch books, which contain a small piece of each color available, adjacent to its color code, to simplify ordering. Swatch books enable designers and technicians to have a true representation of the manufacturers' range of color. Designer is a broad term for a person who designs any of a variety of things. ...
A technician is generally someone in a technological field who has a relatively practical understanding of the general theoretical principles of that field, e. ...
There are also gels for color correction, such as CTB and CTO, which alter or correct the color temperature to be higher with a light blue, or lower with a light orange, respectively. A "half" CTB or CTO is very light, for minor corrections. Colour Correction by using Colour Gels, is a process used in Stage Lighting, Photography, Television, Cinematography to name a few disciplines, the intention of which is to alter the overall quality of the light, measured on a scale known as Colour Temperature. ...
Visible light is commonly described by its color temperature. ...
The term Blue may refer any of a number of similar colors. ...
See also Orange (disambiguation) for other meanings of the word. ...
"ND" is a neutral-density grey, meaning it affects all colors evenly and brings the light down by a given number of f stops. Density (symbol: Ï - Greek: rho) is a measure of mass per volume. ...
Grey or Gray (see spelling differences) is the color between white and black. ...
A 35mm lens set to f/11, as indicated by the white dot above the f-stop scale on the aperture ring In photography the f-number (focal ratio) expresses the diameter of the diaphragm aperture in terms of the effective focal length of the lens. ...
Most ranges of gels also include non-colored media, such as a variety of diffusion and directional "silk" materials to produce special lighting effects. "Opal" for example is an opalescent or translucent diffusion filter. This article or section does not cite its references or sources. ...
OPAL is also the name of one of the four detectors of the Large Electron-Positron Collider. ...
In optics, transparency is the property of being transparent, or allowing light to pass. ...
A diffusion filter is a photographic filter used for a special effect. ...
External links Manufacturers of gel include: |
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