Sign & Digital Graphics

2012 Buyers Guide

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Page 91 of 103

Stochastic Screening—Process that creates colors within a print by varying the number and location 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. SWOP (Specifi cations 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. Symmetry—The balance of design elements in which one side equals the other. 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 defl ecting the edge to create curved cuts. TCP/IP—In electronic digital signage, a networking protocol designed for fl exible, 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 that 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). Mid-J SIGN & DIGITAL GRAPHICS high-speed 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 fl uid, 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 fl at sheet of material and giving it dimension by heating and then forcing it into a mold either mechanically or pneumatically. Also know as pan-forming. Thinner—Any liquid used to reduce the thickness of paint or ink. Three-D Engraving—Routing procedure where the tool bit can be moved independently along the up-and-down Z axis while still traveling an X/Y axes tool path. Through-Cure—In UV-cure printing, when the level of polymerization is equal at virtually all depths of the ink fi lm (versus surface cure, which occurs when only a fi lm of the ink has been completely cured). Both cationic and free radical UV-curing systems require good through cure. Throughput—Actual speed of a printer or plotter in completing a job. Diffi cult to measure, but it represents the unit's ability to process information and print and/or cut an image. Thumbnail—A type of rough sketch before preparing a complete design. In digital imaging, a very small version of a larger fi le used for quick visual identifi cation. Tiling—See Panel. Time Switch—A switch that utilizes a clock or timer to automatically turn on and off electric signs at set times. Time and Temperature Display—Among the fi rst electronic devices to change copy, these popular signs alternate between showing the time and temperature. Some also display simple messages. GLOSSARY

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