Sign & Digital Graphics

2012 Buyers Guide

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RSS—In electronic digital signage, RSS (most commonly translated as "Really Simple Syndication"), is a family of Web feed formats used to publish frequently updated works such news headlines, stock updates, weather reports and the like. An RSS document (called an "RSS feed", "Web feed", or "channel feed") includes full or summarized text, plus metadata such as publishing dates and authorship. Router—In sign-making a router is a machine tool that mills out the surface of metal or wood, usually equipped with various bits and able to remove material along the X,Y and Z axis. In digital signage a router is a networking device whose software and hardware are usually tailored to the tasks of routing and forwarding information. For example, on the Internet, information is directed to various paths by routers. Routing—The elimination of material in a substrate, using a router to remove material. S Samples Per Inch—Unit of measure used to describe the input resolution of a device, such as a scanner or camera, in one-linear-inch increments. Each data point in an RGB image capture includes separate red, green and blue calculations. Sampling—Selection by a computer of the best pieces of information; in scanning, the best bits to interpret the scanned image and present the best- possible image for editing and printing. Sandblasting—A pressurized stream of sand or synthetic particles used to remove material from a substrate, such as glass, wood or HDU. A rubberized stencil of the artwork is either hand- or computer-cut and applied to the substrate, which is then sandblasted. Sans Serif—Any font or typeface that lacks serifs. See also Serif. Saturation—The intensity of a specifi c hue, based on the color's purity, measured from 0-100% in the HSV color model. Highly saturated hues have vivid color, while less saturated hues appear grayish. Scanner—Device employing a mechanism such as a CCD array, to scan an image, printed text or artwork and converts it to a digital image. A common example is the desktop (or fl atbed) scanner where the document is placed on a glass window for scanning. See also Drum Scanner and Linear Scanner. SCGFP (Secondary-Circuit Ground-Fault Protection)—A ground fault detection system built into neon transformers based on the UL 2161 Standard, that detects current fl ow to ground and, if it reaches a preset level (15 mA or greater), turns off the transformer. Scoring—To cut or notch a material prior to bending it. Suffi cient scoring of some substrates— glass and some thicknesses of PVC boards, for example—will also allow them to be broken cleanly without cutting them all the way through. Screen—A frame over which fabric is stretched for use in screen printing. The screen supports the stencil or emulsion through which the ink is forced by the squeegee, creating the print. Screen Angles—In halftone printing, the geometric intervals used to place the four screens in order to eliminate moiré patterns within a print. Screening—Method for positioning dots for reproduction of an image by a printer. The two basic methods are halftone, where dots of varying sizes are placed in an exact, evenly spaced order; and stochastic screening, where small dots of the same size are placed in a random-looking, variable-spaced distribution on an image. Halftone is also known as amplitude modulation (AM), and stochastic as frequency modulated (FM). Screen Printing—Historically one of the oldest and simplest forms of printing. A print is made by using a squeegee to force ink through a stencil or emulsion that's supported by fabric stretched over a frame. Although also referred to as silk screening, several synthetic fabrics have replaced silk as the fabric of choice. Seam—A line formed by the joining together of two separate materials by their edges, as with fl exible face material or wood, metal or plastic sheets. Second-Surface—Refers to a sign made of a clear substrate, such as glass or acrylic, where the art is done in reverse on what will be an interior face of the sign, providing extra protection. Self-Running Script—A script designed to run continuously; for example, to demonstrate a product or service, or provide information without interruption. Also continuous script. Sequence—The operation of a fl asher or chaser, or to the order and frequency of messages in an electronic changeable copy sign, or the pattern of an advertiser's billboard campaign. Also, the order in which inks are deposited by a printing device. Sequencer—A hardware device or computer software that is used to compose a musical score, transcribe it into a MIDI fi le and play or record the result using MIDI instruments. Often used to create audio portions of digital signage content. Serial Communications—Method of sending information from a computer to another device (such as a plotter or printer) by sending one signal at a time through a cable. Serif—A small line or embellishment fi nishing off the strokes of letters in some fonts. Well-known serif fonts include Souvenir, Times Roman and Garamond. Server—Computers used for limited tasks. In networks, servers may act as a hub for storing programs used by different workstation computers; can also act as the machine solely for RIP purposes in large-format color printing. Service Cover—In an electric sign cabinet a panel that allows ready access to the bulbs or lamps and the electrical connections for their replacement and maintenance. Setback—The distance between the primary face of a sign and the property line. Shadow—Duplication of an image that's slightly offset. Drop shadow is a simple copy and offset; block shadow joins the outlines of the original and duplicate to create a 3D-relief effect; and cast alters the shape and size of the duplicate to imitate shadows cast from varied placement of light. Shadow Point—The darkest tone in an image that is printable. Tones darker than the shadow point print as black. The opposite of white point. Mid-J SIGN & DIGITAL GRAPHICS GLOSSARY

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