Sign & Digital Graphics

2012 Buyers Guide

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Page 76 of 103

Current—The fl ux or rate of fl ow of electrical charge carriers in a conductor. A unit of current is typically given in amperes or milliamps (mA). Cut-Outs—Lettering or graphics that are cut from another material, then attached to the sign face to provide depth. Cyclohexanone—A petro-chemical solvent solution. In inkjet printing, it is commonly used as the main carrier in solvent inks. Cyclohexanone is rated by the EPA as a hazardous material containing high levels of harmful VOCs. Mild-solvent (or light solvent) inks contain lower levels of the substance, but still contain VOCs. Fumes from cyclohexanone are managed through proper ventilation or air- scrubbing systems. D Dark Hardening—The continuation of the crosslinking process in UV-curing inks even after exposure to an ultraviolet energy source has ceased. Also called dark cure, or post cure hardening. A feature of cationic UV-curing inks. Database—The collection of data on accounts, media players, jobs, etc., that collectively defi ne an information network installation and its settings. Datacasting— Broadcast of digital information over networks to receivers and media players. Datacasting is sometimes used as an alternative to traditional video broadcasting, because the receivers and player units can have the "intelligence" to customize their playback programming for the location and intended audience. The system of receivers set up to receive messages from a particular datacast are known as datacasting networks, which are a venue for advertisers. Deboss—The process of producing depressed letters, particularly those produced by engraving dies or plates. Decal—Copy and/or graphics printed on a PSA fi lm, then cut to a specifi ed shape. Decompress—The process of expanding a compressed fi le to its original uncompressed form.. Defi nition—The amount of contrast between a sign's art and background. Design Menu—In electronic digital signage, a menu providing access to all the text or graphics utilities that can be used when composing a page for digital content. Die-Cut—A cut made with a steel rule die manufactured to cut a particular shape, commonly, when a large number of shapes with curved lines are to be cut. Also refers to the object that has been cut. Diffusion Pump—A vacuum pump consisting of a boiler, a jet assembly and a cooling chamber, designed to increase the speed of evacuation of a neon tube after bombarding. Digital Media Network—The term digital media network can refer to anything from multiple web sites, to multiple television stations being centrally owned and operated. With the reduction in cost of Delamination—The separation of layers in a laminated substrate. Delamination is most often caused when edges are over-exposed to moisture, temperature extremes or UV light, resulting in adhesive failure. Delta-E (∆E)—The measurement unit, in a uniform color space, of the perceivable differences in color viewable by the human eye. The fi rst noticeable change is 1 ∆E. Delta-E measurement is used, for example, by customers specifying and accepting color, and in manufacturer guarantees of colorfastness. Densitometer—Device that measures the absorption of light in a color, based more on how it reacts to the printed piece than the response of the human eye. Used to check color proofs and coordinate colors between output devices and displays, but measurements remain specifi c to materials and inks/toners. Density—In sign making, a measurement used to express the hardness of foam boards in pounds- per-cubic-foot. Descender—In a given typeface, the portions of the lowercase letters g,j,p,q,y and sometimes the uppercase letter J that extend below the baseline. Device-Independent Color—A color-matching system that relies on a universal set of values, rather than utilizing the color gamut of a given piece of equipment. custom controllable media players, a new breed of digital media network is emerging, known under many different terms. The industry appears to be settling on the term electronic digital signage to describe these new digital media networks, where custom images are digitally delivered to sign-like devices located throughout retail environments, or the enterprise. Digital Multimedia Broadcast—The process of broadcasting multimedia over the Internet, or satellite, to be tuned in by multimedia receivers, or media players, capable of playing back the multimedia program. Through a process called multicast, a single broadcast can send programming to thousands of receivers, which can play back the content individualized to the location. This is one of the advantages of multimedia broadcasting over traditional video broadcasting. Digital Printer—A printing device that is capable of translating digital data into hardcopy output. Technologies employed in digital printers include inkjet, thermal transfer, photo-imaging. electrostatic and laser Digital Video—A video that has been digitized so that it can be controlled from a PC and displayed directly on a computer monitor. Diode—A solid-state device that allows electrical current to pass through it in only one direction. Think of it as a one-way valve for electrons. Direct Current (DC)—One of three varieties of electricity. Specifi cally, a current that always fl ows in one direction, around and around, as in the electricity that powers household batteries. See also Alternating Current. Directional Sign—Signs designed to provide direction to travelers. The Highway Beautifi cation Act sets guidelines for the size, placement and content of true directional signs. Directly Illuminated—A sign that is illuminated by a source other than ambient light; any lighted sign. Directory Sign—An on-premise sign that identifi es the names and locations of tenants in a multi-tenant building, or group of buildings. Mid-June 2012 71

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