Sign & Digital Graphics

2012 Buyers Guide

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Parallel Communications—Method of sending information from a computer to another device (such as a plotter or printer) by sending multiple signals at one time through a cable. Pantone Matching System (PMS)—A numbering system for identifying 3,000+ colors created through combinations of 14 base colors. The Pantone company produces numerous color- matching systems for standard print and computer applications. Pattern—In sign-making, a full-sized layout of the work to be done. Pass—In inkjet printing this refers to the number of times a printhead passes over a substrate depositing ink. The greater number of passes, the more ink density is achieved. PCI (Peripheral Connect Interface)—An advanced expansion-bus standard for internal peripheral electronic digital signage devices, commonly used by high performance graphics adapters. Pegged Out—Mounting letters so they are separated from the surface on which they're being attached. Although an important part of affi xing reverse channel letters, metal, plastic or wood letters may also be pegged out to keep stains from washing down on the letters or for visual impact. Perforating Wheel—A toothed wheel on a handle that allows it to rotate freely, used to trace line art, creating perforations for pattern making. Also called a pounce wheel. See also Pounce Pattern and Pounce Pad. Periodic Scheduling—A type of scheduling that defi nes ranges of time within which events are allowed to play. Permit—A license granted by the appropriate authorities to allow a sign to be erected. PDF (Portable Document Format)—Electronic document format from Adobe Systems Inc. that allows the packaging of fi les for distribution across platforms for display and printing as originally designed. Phosphors—Chemical powders used to coat fl uorescent tubes. A range of phosphors is available to produce a large variety of colors and whites. Photo-Cut—Method of vectorizing an image in a parallel-line pattern to give a rough, but recognizable, rendering of sharp outlines from a high- to medium-contrast photograph. Photoinitiator—A molecular ingredient in UV- curing inks that absorbs incident UV energy, becomes excited and initiates a chain reaction with liquid oligomers and monomers, resulting in polymerization and the creation of a hardened UV ink. Photostencil—A stencil prepared using photographic, rather than mechanical methods. Pictogram—A pictorial symbol commonly found in environmental graphics and regulatory (traffi c) signs. Pictorial—A picture on a sign that does not involve animation. A pictorial can range from one-color graphic symbols and posterized pictures to full- color scenes and portraits. Piezo Inkjet—A type of printhead that uses the oscillations of electrically-stimulated piezoelectric crystals to force ink through inkjet nozzles. Pigment—A compound used to color other materials, such as paints and inks. Pigments are insoluble, fi nely ground particles and may be organic or inorganic. Pinch Roller—Wheeled holder, usually tensioned by springs that clamp vinyl or other materials between it and a grit wheel for transporting the medium through a friction-feed plotter. Pixel—With digital production, a part of a picture that can be located and placed as an element along the X and Y axes. Pixelization—Process where the number of pixels are simply multiplied to increase resolution. The result is a higher dpi but the altering of detail from smooth to square-step lines, or jaggies. Plasma Display Panel (PDP)—A type of fl at screen display device that is used for television, computer monitors, and dynamic signage. Similar to an LCD panel, they consist of two layers of glass surrounding cells of xenon and neon glass. Surrounding electrodes switch the cells on and off, causing them to emit light and create the picture. This emitted light makes PDPs have an appealing vibrancy that competes with Cathode Ray Tubes (CRTs), the technology of traditional televisions. Also known as gas plasma displays or plasma displays Plastic-Faced Letter—Channel letter in which the front of the channel is covered by plastic material or facing, hiding the neon tube from view. Plot Plan—A drawing or sketch showing the layout looking down on the site on which a sign is to be erected. Plotter—Device that interprets information sent from a computer and moves a tool head to a series of coordinates based on the device's X and Y axes. Sign makers use a plotter equipped with a knife to cut vinyl, with the X and Y coordinates forming an outline that can be weeded and installed on a surface. Plug-Ins—Small, limited-purpose programs that work with and add capabilities to larger graphics applications such as Photoshop. PMT (Photomultipliers Tubes)—Light-sensitive elements used in drum scanners. PMTs accept four beams of light from a scanner—RGB and a separate beam for image sharpness—for eventual converting to digital information. Usually seen as more-sensitive and having greater dynamic range than CCD-based scanners. Polariscope—An instrument for ascertaining, measuring, or exhibiting the properties of polarized light; can be used to check neon tubes for stress. Pole Sign—A free-standing sign, usually double- faced, mounted on a round pole, square tube or other fabricated member without any type of secondary support. Polling—Method where a computer sends a signal to a plotter or printer requesting information on the current production area. The device sends back production parameters; the production software then sets panels based on the information. Works only with serial communications. Polling Interval—The length of time that may elapse before a media player checks for a certain condition, such as whether a job has been delivered to its job folder, or whether its script has been updated. Mid-June 2012 81

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