Sign & Digital Graphics

2013 Buyer's Guide

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Terms of the Trade Spectrophotometer—A color measurement device using the distinct wavelength (spectral) values of light to indicate a spectral reflectance, emittance or transmittance curve along the visible spectrum (380–720 nm). A more sophisticated device than a colorimeter. Speedball Pen—A type of hand-lettering pen preferred by many sign artists for use on showcards because of its rounded point, and because the pen's ink container opens, making it easy to clean. Spindle—Device that holds the cutting bit during the routing or engraving process. Spooler—Area where data used in printing is held before going to the printing device. It may be part of the computer's RAM, or its hard drive. Spot Color—Color used for a specific need within a print. It may be a separate, special tone to match a corporate color, or it may result from the overlapping of colors within a halftone. Spot White—An application in which white ink is used as an independent color (usually for printing text on a non-white surface). Sprocket Feed—Process where material is fed through a plotter by aligning pre-punched holes along the medium edges with raised points along the ends of the plotter's motor-driven drum wheel. Also called tractor feed or pin feed. Sputtering—Occurs when the electrode in a  neon tube, because of the heat and electrical forces, gradually erodes, blackening the ends of the tube near the electrode and decreasing gas pressure, eventually making the tube inoperative. Squeegee—In screen printing, a flexible blade mounted in a wood or metal handle and used to force ink through a stencil mounted on a screen. In sign making, a hard plastic or nylon blade used to apply pressure to increase surface adhesion between cut vinyl and the transfer tape or between the vinyl and sign face. Stencil—A thin sheet of material into which a design is cut; often used in various screen printing processes. cation of its dots, rather than through varying the size of the dots. Stopcock—A valve for controlling or stopping the movement of a liquid or gas. Store and Forward—A networking term referring to when information is stored at routing points before its ultimate destination. Store and forward can be used to reduce the load on the original server. Media players can retrieve their data from other players instead of the original broadcast site. Streamer—A long, narrow banner intended for interior or window display only. Stretching—The process of securing mesh to a frame in screen printing. Stroke—A pass of the squeegee in screen printing, and a pass of the brush in painting. Structure—In the sign industry, a structure designed for and capable of supporting a sign. Sublimation—Process in which an image is printed by turning ink or toner, by heat and pressure, into a gas, which then impregnates itself into a substrate or a special coating on a substrate. Subtractive Colors—The color system used in printing in which Cyan, Magenta and Yellow (CMY) colors are used to create all other colors in color printing. When CMY are combined at 100 percent on a white surface, black is produced. Most printing systems also use black(K) pigment rather than always combining CMY. Substrate—The material out of which a sign face is made. Wood, metal sheeting, paper and acrylic are all sign substrates. In screen printing and inkjet printing, a substrate can be any printable material, but usually some form of rigid sheet; or it may refer to a rigid mounting board. Supports—Insulators that support a neon tube, as well as hold it away from the background surface and provide some impact resistance. Also known as stand-offs. Stepper Motor—A type of motor used on computerized routers and engravers to accurately move a cutting tool or lens in either the X or Y axis. SWOP (Specifications for Web Offset Publications)—Refers to, among other things, inks formulated exclusively for web offset printing, and provides the basis for standard Pantone color matching. Stippling—A method for taking out brush marks and creating a transparent look on windows. Symmetry—The balance of design elements in which one side equals the other. Stochastic Screening—Process that creates colors within a print by varying the number and lo- 118 • Mid-June 2013 • S I G N SBGuide.indd 118 T T-Slot—Channels in a router or engraving-table surface that hold special clamps for holding-down substrates. The T-clamp goes into a slot like an upside-down "T". Tack—The stickiness of an adhesive under a given condition. Some adhesives require a particular temperature range for maximum tack. Tactile Sign—A sign—or area within a larger sign— that conveys its message through raised or engraved art, making it accessible to the visually impaired. Term could be applied to Braille signage. Tangential Knife—Blade holder on a plotter that is mechanically turned (usually with a motor/ belt drive) to aid in deflecting the edge to create curved cuts. TCP/IP—In electronic digital signage , a networking protocol designed for flexible, high-speed communications, used for LANs and the Internet. Tempera—Pigment mixed in a water medium, usually with a binder and adhesive. Tempera paints produce a luminous effect, often used on showcards. Template—A pattern, often made of thin metal or wood. Temporary Sign—Any sign which is not intended to be permanently installed, such as banners and construction site signs. Often, sign codes seek to limit the length of time a temporary sign can be in place. Termination—In  UV-curing, the cessation of the process of crosslinking due to oxygen inhibition (in free radical UV curing systems), or relative humidity inhibition (in cationic UV curing systems). Thermal Inkjet—Inkjet printhead technology where inks are heated in a chamber located above the printhead to a temperature greater than the boiling point of the liquid. Heat changes the characteristics of the fluid, causing it to expand and be expelled through the printhead nozzle onto the substrate. Thermal Transfer Printer—Printing device that uses a heating-element head to transfer resin- or wax-based colors from a carrier sheet (a ribbon or foil) to a medium. Thermoforming—Taking a flat sheet of material and giving it dimension by heating and then forc- & D I G I TA L G R A P H I C S 5/31/13 12:37 PM

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