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Stripping (printing)
Within the commercial printing industry, the job of stripping involves arranging and joining film negatives as part of the process of preparing printing plates. In the UK, the same operation is termed "planning" and film positives are used, rather than the negatives in the USA. Because the industry has largely moved to digital processes, the job of stripping, or planning has become rare or even obsolete. Negatives may be set up in a pattern to allow a printing press to print 4, 8, 16 or 32 pages at a time, front and back, which are then folded to produce a brochure or book with the correct pagination (see figure) or a variety of smaller printed products of various sizes may be arranged on a single larger press sheet to be cut down after printing into individual job components, such as business or post cards, folding boxes or hang tags. Color and density For color processes, an individual black and white, "screened" negative is used to represent each color in a four-colour process ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Film Negative
In photography, a negative is an image, usually on a strip or sheet of transparent plastic film, in which the lightest areas of the photographed subject appear darkest and the darkest areas appear lightest. This reversed order occurs because the extremely light-sensitive chemicals a camera film must use to capture an image quickly enough for ordinary picture-taking are darkened, rather than bleached, by exposure to light and subsequent photographic processing. In the case of color negatives, the colors are also reversed into their respective complementary colors. Typical color negatives have an overall dull orange tint due to an automatic color-masking feature that ultimately results in improved color reproduction. Negatives are normally used to make positive prints on photographic paper by projecting the negative onto the paper with a photographic enlarger or making a contact print. The paper is also darkened in proportion to its exposure to light, so a second reversal result ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Printing Press
A printing press is a mechanical device for applying pressure to an inked surface resting upon a printing, print medium (such as paper or cloth), thereby transferring the ink. It marked a dramatic improvement on earlier printing methods in which the cloth, paper or other medium was brushed or rubbed repeatedly to achieve the transfer of ink, and accelerated the process. Typically used for texts, the invention and global spread of the printing press was one of the most influential events in the second millennium. In Germany, around 1440, goldsmith Johannes Gutenberg invented the movable-type printing press, which started the Printing Revolution. Modelled on the design of existing screw presses, a single Renaissance movable-type printing press could produce up to 3,600 pages per workday, compared to forty by History of typography in East Asia, hand-printing and a few by scribe, hand-copying. Gutenberg's newly devised matrix (printing), hand mould made possible the precise and ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Prepress
Prepress is the term used in the Printing and Publishing industries for the processes and procedures that occur between the creation of a print layout and the final printing. The prepress process includes the preparation of artwork for press, media selection, proofing, quality control checks and the production of printing plates if required. The artwork is usually delivery from the customer as a print-ready PDF file after being created in programs such as Adobe Indesign, Quark Express, Affinity Publisher or Scribus. Processes # Paper Selection is a very important step in prepress. Coated, Uncoated, Gloss, Matte, Silk, Satin, Recycled, Card, Bond or Specialist Papers are normal options available in different thicknesses such as 80gsm, 100gsm or 130gsm. # Binding Selection gives the customer multiple options for the spine of the publication such as Saddle-stitched,Perfect binding vs saddle stitching, paperspecs.com (last checked 2022-12-18) Perfect Bound or Case Bound, als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imposition
Imposition is one of the fundamental steps in the prepress printing process. It consists of the arrangement of the printed product’s pages on the printer’s sheet, in order to obtain faster printing, simplify binding and reduce paper waste. Correct imposition minimizes printing time by maximizing the number of pages per impression, reducing cost of press time and materials. To achieve this, the printed sheet must be filled as fully as possible. Task The arrangement of pages on the printer’s sheet is affected by five different parameters: * Format of the product: The size of the finished page determines how many pages can be printed on a single sheet. * Number of pages of the printed product: The compositor must determine how many sheets are to be printed to create a finished book. * Stitching/binding method: The compositor must understand how the sheets are placed to form the signatures that compose the finished book. * Paper fiber direction: Many papers have a "grain," ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Platesetter
Computer-to-plate (CTP) is an imaging technology used in modern printing processes. In this technology, an image created in a Desktop Publishing (DTP) application is output directly to a printing plate. This compares with the older technology, computer-to-film (CTF), where the computer file is output onto a photographic film. This film is then used to make a printing plate, in a similar manner to a contact proof in darkroom photography. Technology CTP methods differ according to the construction type of the imagesetter and the light source used to expose the plate surface. In terms of construction type there are three different kinds: internal drum, external drum and flat-bed imagesetters. The two main light sources used to expose the plate are ultraviolet light lamps and laser diodes. The wavelength and energy of the laser diodes depend on the type of plate that is used. This technology is mainly used in newspaper and magazine printing. Internal drum imagesetters In an internal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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