|
Four-color Printing
The CMYK color model (also known as process color, or four color) is a subtractive color model, based on the CMY color model, used in color printing, and is also used to describe the printing process itself. The abbreviation ''CMYK'' refers to the four ink plates used: cyan, magenta, yellow, and key (most often black). The CMYK model works by partially or entirely masking colors on a lighter, usually white, background. The ink reduces the light that would otherwise be reflected. Such a model is called ''subtractive'', as inks ''subtract'' some colors from white light; in the CMY model, white light minus red leaves cyan, white light minus green leaves magenta, and white light minus blue leaves yellow. In additive color models, such as RGB, white is the ''additive'' combination of all primary colored lights, and black is the absence of light. In the CMYK model, it is the opposite: white is the natural color of the paper or other background, and black results from a ful ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerulean
The color cerulean (American English) or caerulean (British English, Commonwealth English), is a variety of the hue of blue that may range from a light azure blue to a more intense sky blue. Cerulean may also be mixed with the hue of green. The first recorded use of ''cerulean'' as a color name in English was in 1590. The word is derived from the Latin word '' caeruleus'' (), "dark blue, blue, or blue-green", which in turn probably derives from , diminutive of , "heaven, sky". "Cerulean blue" is the name of a blue-green pigment consisting of cobalt stannate (). The pigment was first synthesized in the late eighteenth century by Albrecht Höpfner, a Swiss chemist, and it was known as Höpfner blue during the first half of the nineteenth century. Art suppliers began referring to cobalt stannate as cerulean in the second half of the nineteenth century. It was not widely used by artists until the 1870s when it became available in oil paint. Pigment characteristics The primar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halftone
Halftone is the reprographic technique that simulates continuous tone, continuous-tone imagery through the use of dots, varying either in size or in spacing, thus generating a gradient-like effect.Campbell, Alastair. ''The Designer's Lexicon''. ©2000 Chronicle, San Francisco. "Halftone" can also be used to refer specifically to the image that is produced by this process. Where continuous-tone imagery contains an infinite range of colors or greys, the halftone process reduces visual reproductions to an image that is printed with only one color of ink, in dots of differing size (pulse-width modulation) or spacing (frequency modulation) or both. This reproduction relies on a basic optical illusion: when the halftone dots are small, the human eye interprets the patterned areas as if they were smooth tones. At a microscopic level, developed black-and-white photographic film also consists of only two colors, and not an infinite range of continuous tones. For details, see film grain. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Under Color Addition
In four-color printing The CMYK color model (also known as process color, or four color) is a subtractive color model, based on the CMY color model, used in color printing, and is also used to describe the printing process itself. The abbreviation ''CMYK'' refers ... (or more), under color addition (UCA) is a technique for darkening areas of the printed image by adding colored inks. It is meant to achieve the same results as under color removal, but from a different starting position. Under color removal replaces colored inks in selected areas with black ink to achieve a darker appearance, whereas with under color addition, small portions of the three colors are added to these areas instead of, or in addition to, using black ink. UCA is used to reduce the speckle effects of dithering, especially with very light colors. Without UCA, a very light grey would consist of infrequent black specks that might be individually noticeable. With UCA, the specks are lighter and 3x mor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Under Color Removal
In printing, under color removal (UCR) is a process of eliminating overlapping yellow, magenta, and cyan that would have added to a dark neutral (black) and leaving the black ink only, called a ''full black'', during the color separation process. Under color removal is used in '' process color'' printing. Black ink used to add details and darkness in shadowed areas is called a ''skeletal black''. With current ink technology, the total CMYK ink in the shadows refuses to stick after it reaches the dark shadows (usually above a 250% total CMYK coverage), and begins to peel off. To prevent this, printers developed UCR, in which neutral shadowswhich would have normally been produced by overprinting the four inks ''cyan'', ''magenta'', ''yellow'' and ''black'' on top of each other (high ink coverage)are replaced with the single layer of ''black''. UCR removes the color inks ''under'' the black, resulting in a single layer of ink which sticks to the sheet better, and saves on the consum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rich Black
Rich black, in printing, is an ink mixture of solid black over one or more of the other CMYK color model, CMYK colors, resulting in a darker tone than black ink alone generates in a printing process. A typical rich black mixture might be 100% black, 50% of each of the other three inks. Other percentages are used to achieve specific results, for example 100% black with 70% cyan (C), 35% magenta (M), and 40% yellow (Y) is used to achieve "cool" black. "Warm Black" is 35%C, 60%M, 60%Y, and 100%K. The colored ink under the black ink makes a "richer" result; the additional inks absorb more light, resulting in a closer approximation of true black. While, in theory, an even richer black can be made by using 100% of each of the four inks, in practice, the amount of non-black ink added is limited by the wetness that the paper and printing process can handle. (A safe and practical rule of thumb is that ink coverage should not exceed 240% on normal papers. Papers that "pick", such as low-e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Visible Spectrum
The visible spectrum is the spectral band, band of the electromagnetic spectrum that is visual perception, visible to the human eye. Electromagnetic radiation in this range of wavelengths is called ''visible light'' (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well, known collectively as ''optical radiation''. A typical human eye will respond to wavelengths from about 380 to about 750 nanometers. In terms of frequency, this corresponds to a band in the vicinity of 400–790 Terahertz (unit), terahertz. These boundaries are not sharply defined and may vary per individual. Under optimal conditions, these limits of human perception can extend to 310 nm (ultraviolet) and 1100 nm (near infrared). The spectrum does not contain all the colors that the human visual system can distinguish. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Newsprint
Newsprint is a low-cost, non-archival paper consisting mainly of wood pulp and most commonly used to print newspapers and other publications and advertising material. Invented in 1844 by Charles Fenerty of Nova Scotia, Canada, it usually has an off white cast and distinctive feel. It is designed for use in printing presses that employ a long web of paper ( web offset, letterpress and flexographic), rather than individual sheets of paper. Newsprint is favored by publishers and printers as it is relatively low cost (compared with paper grades used for glossy magazines and sales brochures), strong (to run through modern high-speed web printing presses) and can accept four-color printing at qualities that meet the needs of typical newspapers. Invention Charles Fenerty began experimenting with wood pulp around 1838, making his discovery in 1844. On October 26, 1844, Fenerty took a sample of his paper to Halifax's top newspaper, the '' Acadian Recorder'', where he had written ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Printing Registration
In color printing, print registration is the layering of printed patterns to form a multicolor pattern. Registration error is the "position misalignment in the overlapped patterns." Machine components such as the print cylinder, doctor blade assembly, printing plates, stress/friction and more, affect the registration of the machine. Inconsistencies among these components can cause the printing press to fall out of registration; that is when press operators will begin to see defects in their print. There are many different ways to achieve proper registration, many of which employ the alignment of registration marks (pictured right). Many press manufacturers have installed automatic register systems to assist the operator in getting the print back into proper alignment. Purpose When printing an image or a package of some sort that has more than one color, it is necessary to print each color separately and ensure each color overlaps the others precisely. If this is not done, the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serif
In typography, a serif () is a small line or stroke regularly attached to the end of a larger stroke in a letter or symbol within a particular font or family of fonts. A typeface or "font family" making use of serifs is called a serif typeface (or serifed typeface), and a typeface that does not include them is sans-serif. Some typography sources refer to sans-serif typefaces as "grotesque" (in German language, German, ) or "Gothic" (although this often refers to blackletter type as well). In German usage, the term Antiqua (typeface class), Antiqua is used more broadly for serif types. Serif typefaces can be broadly classified into one of four subgroups: Serif#Old-style, Old-style, Serif#Transitional, Transitional, Serif#Didone, Didone, and Serif#Slab serif, Slab serif, in order of first emergence. Origins and etymology Serifs originated from the first official Greek writings on stone and in Latin alphabet with Roman square capitals, inscriptional lettering—words carved into s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gizmodo
''Gizmodo'' () is a design, technology, science, and science fiction website. It was originally launched as part of the Gawker Media network run by Nick Denton. ''Gizmodo'' also includes the sub-blogs ''io9'' and ''Earther'', which focus on pop-culture and environmentalism, respectively. Following the Chapter 11, Title 11, United States Code, Chapter 11 bankruptcy and Liquidation of Gawker Media, Univision Communications, Univision purchased ''Gizmodo'' along with other Gawker websites in August 2016. In 2019, Univision sold the Gizmodo Media Group, which included ''Gizmodo'', to the private equity firm Great Hill Partners. From April 2019 to June 2024, ''Gizmodo'' was part of G/O Media. In June 2024, the website was purchased by Swiss digital media company Keleops Media. History Origins and Gawker Media The blog, launched in 2002, was originally edited by Peter Rojas, who was later recruited by Weblogs, Inc. to launch its similar technology blog, ''Engadget''. By mid-2004 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keyline
A keyline, in graphic design, is a boundary line that separates color and monochromatic areas or differently colored areas of printing on a given page or other printed piece. The line itself, usually consisting of a black (or other dark colored) border, provides an area in which lighter colors can be printed with slight variation in registration. In traditional paste-up graphics workflows, keylines for cropping were often merely indicated on original artwork, and then images were stripped into the area manually with the keylines themselves being added as part of the process. Keylines are often included when printing something that will be cut out using a die form, requires folding, or uses perforation lines. Per the International Paper The International Paper Company is an American pulp and paper company, the largest such company in the world. It has approximately 39,000 employees, and is headquartered in Memphis, Tennessee. History The company was incorporated January 31 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CMYK Offset On Paper2
The CMYK color model (also known as process color, or four color) is a Subtractive color, subtractive color model, based on the CMY color model, used in color printing, and is also used to describe the printing process itself. The abbreviation ''CMYK'' refers to the four ink plates used: cyan, cyan, magenta, magenta, yellow, yellow, and key plate, key (most often black). The CMYK model works by partially or entirely masking colors on a lighter, usually white, background. The ink reduces the light that would otherwise be reflected. Such a model is called ''subtractive'', as inks ''subtract'' some colors from white light; in the CMY model, white light minus red leaves cyan, white light minus green leaves magenta, and white light minus blue leaves yellow. In additive color models, such as RGB color model, RGB, white is the ''additive'' combination of all primary color, primary colored lights, and black is the absence of light. In the CMYK model, it is the opposite: white is the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
