SIGN TERMINOLOGY

Understanding sign terminology helps business owners, contractors, architects, designers, and facility managers make better decisions when planning a custom sign project. This glossary explains common sign industry terms used in the design, fabrication, installation, service, and permitting of commercial signs, channel letters, cabinet signs, monument signs, pylon signs, vehicle graphics, and illuminated signage.

Sign Industry Definitions

Access Door

An access door is a hinged or removable panel built into a sign cabinet, channel letter, light box, or electric sign so technicians can reach the internal components. Access doors make it easier to inspect, service, repair, or replace parts such as LED modules, wiring, power supplies, ballasts, transformers, and mounting hardware. Also called an access panel.

Access Panel

An access panel is a service opening on a sign that allows maintenance crews to reach the inside of the sign without removing the entire sign face or cabinet. Access panels are commonly used on illuminated signs, cabinet signs, channel letter signs, and other electric signage where future service access is important. Also called an access door.

Acrylic

Acrylic is a durable plastic material often used for sign faces, formed faces, push-through letters, and illuminated sign panels. In the sign industry, acrylic is valued because it can transmit light evenly, be cut or formed into shapes, and accept vinyl graphics or printed decoration. Acrylic sign faces are commonly used on cabinet signs, channel letters, and lighted business signs.

Adhesion

Adhesion is the bond that holds one material to another, such as vinyl to a sign face, paint to aluminum, or adhesive tape to a mounting surface. Good adhesion depends on surface preparation, cleanliness, material compatibility, temperature, and the type of adhesive used. In sign manufacturing and installation, proper adhesion helps graphics, letters, and components stay secure over time.

Adhesive

An adhesive is a bonding material used to attach two surfaces together. In sign making, adhesives may include glue, epoxy, structural tape, vinyl adhesive, silicone, or specialty bonding products for metal, acrylic, polycarbonate, and other sign materials. Choosing the right adhesive helps improve durability, weather resistance, and long-term sign performance.

Aluminum

Aluminum is a lightweight, rust-resistant metal commonly used for sign panels, sign cabinets, raceways, poles, frames, and mounting structures. It offers a strong balance of durability and manageable weight, making it a popular material for both indoor and outdoor signs. Aluminum is often used in commercial signage because it resists corrosion and can be painted, routed, fabricated, or finished in many ways.

Animated Sign

An animated sign uses changing lights, sequencing, motion effects, or controlled illumination to create the appearance of movement. These signs may use LEDs, lamps, electronic controls, or other lighting systems to attract attention and communicate a message. Animated signs are often used for high-visibility retail signs, entertainment venues, and promotional displays, depending on local sign code rules.

Anodized Finish

An anodized finish is a protective oxide coating applied to aluminum or other metals through an electrochemical process. This finish improves corrosion resistance, hardens the surface, and can create a clean decorative appearance in different colors. Anodized aluminum is often used for architectural signs, dimensional letters, frames, and sign components where a professional metal finish is desired.

Architectural Signage

Architectural signage refers to signs designed to work with a building, campus, office, retail center, healthcare facility, school, or public space. These signs often provide wayfinding, room identification, branding, directories, compliance information, or site-specific guidance. Architectural signs are usually planned to match the style, materials, and function of the built environment.

Aspect Ratio

Aspect ratio is the proportional relationship between the width and height of an image, sign layout, display screen, or digital graphic. For example, a 16:9 aspect ratio means the image is wider than it is tall. In signage, maintaining the correct aspect ratio helps prevent logos, photos, graphics, and digital artwork from looking stretched, squeezed, or distorted.

Back-to-Back Sign

A back-to-back sign has two sign faces mounted in opposite directions so the message can be seen from two sides. This type of sign is common for pole signs, pylon signs, monument signs, hanging signs, and other freestanding signs placed near roads, sidewalks, or parking lots. Also called a double-faced sign.

Backlighted Letter

A backlighted letter is a reverse channel letter that shines light toward the wall or mounting surface behind it instead of through the front face. This creates a soft glow around the letter, often called a halo effect. Backlighted letters are popular for upscale storefront signs, restaurant signs, office signs, and architectural branding.

Backlit Sign

A backlit sign is a sign illuminated from behind the sign face so the graphics, letters, or message appear bright and readable. Backlit signs often use LED lighting inside a sign cabinet or light box. They are commonly used for storefront signs, retail signs, cabinet signs, menu signs, and illuminated business identification.

Ballast

A ballast is an electrical device used to regulate current for fluorescent lamps and some older illuminated sign systems. In sign applications, a ballast helps fluorescent lighting start and operate properly. Many modern signs now use LED power supplies instead of fluorescent ballasts.

Blackout

Blackout is a special paint, coating, vinyl, or masking material used to block unwanted light from passing through parts of an illuminated sign. It is often used to create clean letter separation, prevent light leaks, or control the appearance of neon, LED, or cabinet signs. Also called blockout.

Blade Sign

A blade sign is a projecting sign mounted perpendicular to a wall or building face so it can be seen by pedestrians or traffic moving along the storefront. Blade signs are commonly used in shopping districts, downtown storefronts, malls, restaurants, offices, and retail centers. They are useful when visibility from the sidewalk or side approach matters more than visibility straight-on.

Cabinet Sign

A cabinet sign is a sign structure made from a frame or enclosure with one or more sign faces. Cabinet signs may be internally illuminated with LEDs or fluorescent lighting, or they may be non-illuminated depending on the application. They are widely used for storefront signs, pole signs, pylon signs, wall signs, and commercial building identification.

CAD

CAD stands for computer-aided design. In sign manufacturing, CAD software is used to create accurate layouts, drawings, patterns, fabrication files, and installation plans. CAD helps sign companies design custom signs, channel letters, cabinets, routed panels, dimensional letters, and mounting details before production begins.

CAS

CAS stands for computer-aided sign making. This term refers to the use of software and computer-controlled equipment to design, cut, route, print, fabricate, and produce signs. CAS workflows may involve vinyl cutters, CNC routers, digital printers, design software, and production files.

Channel Letter

A channel letter is a custom three-dimensional letter, number, or logo element that may be fabricated from metal, plastic, or other sign materials. Channel letters are often illuminated with LEDs and mounted to a building fascia, raceway, or backing panel. They are one of the most common choices for storefront signs, retail signs, restaurant signs, and commercial building identification.

CMYK

CMYK stands for cyan, magenta, yellow, and black, the four ink colors used in many full-color printing processes. In sign production, CMYK is important for printed vinyl graphics, banners, decals, vehicle wraps, and digital graphic signs. Proper CMYK color setup helps printed sign graphics reproduce more accurately.

Color Temperature / CCT

Color temperature, often called CCT or correlated color temperature, describes the warmth or coolness of white light and is measured in Kelvin. Lower values, such as 3000K, appear warmer and more amber, while higher values can appear cooler or bluer. In illuminated signs, choosing the right LED color temperature affects readability, brand appearance, and how accurately sign colors appear at night.

Dimensional Letters

Dimensional letters are raised, three-dimensional letters used for building signs, lobby signs, wall signs, and business identification. They may be made from acrylic, aluminum, stainless steel, PVC, foam, or other materials. Dimensional letters create a professional look without always requiring internal illumination.

Direct Illumination

Direct illumination means lighting a sign with an external light source aimed at the sign face. This may include gooseneck lights, floodlights, spotlights, or architectural lighting. Direct illumination is often used for monument signs, wall signs, carved signs, and signs where internal lighting is not required or not practical.

Efficiency

Efficiency in sign lighting refers to how much light a lamp or LED system produces compared with how much power it uses. It is often measured in lumens per watt. Higher-efficiency sign lighting can reduce electrical usage while still maintaining good visibility and brightness.

Electric Sign

An electric sign is any sign that contains electrical components such as LEDs, lamps, wiring, power supplies, transformers, ballasts, or electronic controls. Electric signs may include channel letters, cabinet signs, neon signs, electronic message centers, and illuminated monument signs. These signs must be designed, fabricated, installed, and serviced according to applicable electrical and safety standards.

Electronic Message Center / EMC

An electronic message center, often abbreviated EMC, is a programmable sign that displays changeable messages using electronic technology. EMC signs may use LED displays or other digital display systems to show text, graphics, time, temperature, promotions, or public information. They are often used by schools, churches, banks, municipalities, shopping centers, and businesses that need frequently updated messages.

Electronic Message Centers

Electronic message centers are programmable signs that allow the displayed content to be changed electronically rather than manually replacing letters or panels. These signs are also known as electronic displays, LED message signs, or electronic changeable copy signs. They can improve communication for businesses and organizations that need flexible sign messaging.

Embossed Plastic Sign Face

An embossed plastic sign face is a plastic sign face with raised or recessed three-dimensional lettering or graphics formed into the surface. This is commonly done through vacuum forming or thermoforming. Also called a pan face, this type of sign face can add depth, durability, and a more dimensional appearance to cabinet signs and illuminated signs.

Epoxy

Epoxy is a strong two-part adhesive made from resin and a hardening agent. In sign fabrication and installation, epoxy can bond materials such as metal, plastic, composites, wood, and masonry when the correct product is used. Epoxy is often chosen when a high-strength, durable bond is needed.

Fabricate

To fabricate a sign means to manufacture, build, shape, assemble, or produce the sign or its major components. Sign fabrication may include cutting, welding, forming, routing, painting, wiring, assembling, and finishing. A fabricated sign is custom-built to match the design, size, materials, and installation requirements of a project.

Fabricated Letter

A fabricated letter is a dimensional letter built from sheet metal or other materials rather than cut from a solid flat sheet. Fabricated letters can be made in custom depths, sizes, finishes, and lighting styles. They are commonly used for channel letters, reverse channel letters, halo-lit letters, and high-end architectural signage.

Facade

A facade is the exterior face of a building, especially the front or most visible side. In signage, the facade is important because it determines where wall signs, channel letters, blade signs, and building identification signs can be mounted. Sign design often considers the facade material, visibility, mounting method, sign code, and architectural style.

Face

The face of a sign is the main visible message area where the copy, logo, graphics, or branding appears. A sign may have one face, two faces, or multiple faces depending on the sign type. Also called a sign face or panel.

Fasteners

Fasteners are the mechanical parts used to hold a sign, sign face, letters, frame, cabinet, or mounting structure together. Common fasteners include screws, nuts, bolts, clips, rivets, anchors, and brackets. Choosing the right fasteners is important for strength, safety, weather resistance, and long-term sign performance.

Flat Cutout Letter

A flat cutout letter is a non-illuminated letter cut from a flat sheet of material such as aluminum, acrylic, PVC, stainless steel, brass, or other plate stock. Flat cutout letters provide a clean dimensional look for building signs, wall signs, office signs, and lobby signs. They can be painted, polished, brushed, or finished to match brand colors and architectural details.

Flex Face

A flex face is a flexible sign face material stretched over a supporting frame. Flex face signs are often used for large cabinet signs, pylon signs, and high-wind outdoor signs because the material can cover large areas without heavy rigid panels. Flex face material can be decorated with translucent graphics for illuminated signs or opaque graphics for non-illuminated signs.

Four Color Process

Four color process is a printing method that uses CMYK inks to reproduce full-color images and graphics. In sign making, this process is used for digital prints, vinyl graphics, banners, vehicle wraps, decals, and display graphics. Also called process color.

Front/Back Lit Letter

A front/back lit letter is a channel letter or logo that illuminates through the front face and also casts light from the back side. This creates both direct face illumination and a halo lighting effect around the letter. Front/back lit letters are often used when a sign needs strong nighttime visibility and a premium architectural appearance.

Gauge

Gauge is a measurement used to describe the thickness of sheet metal, wire, and certain sign materials. In many gauge systems, a lower gauge number means a thicker material. Gauge matters in sign fabrication because material thickness affects strength, weight, durability, and forming ability.

Grommet

A grommet is a small metal or plastic ring installed into a hole in flexible sign material, banner material, fabric, or vinyl. Grommets reinforce the hole, reduce tearing, and provide a strong opening for rope, hooks, zip ties, or mounting hardware. Also called an eyelet.

H Channel Letter

An H channel letter is a dimensional letter designed with internal baffles or supports that help hold LED modules, neon tubing, transformers, or other components. The H-style cross section can provide structural support and help separate lighting areas. This type of construction is used in certain channel letter and illuminated sign designs.

Halo

A halo is the glow of light that appears around a letter, logo, or sign element when light reflects off the wall or background behind it. Halo effects are commonly created with reverse channel letters or backlit letters. Halo lighting gives business signs, restaurant signs, and architectural signs a refined nighttime appearance.

Halo Lighting

Halo lighting is a sign lighting method where the light source is placed behind or inside the sign element and directed toward the mounting surface. The reflected light creates a glow around the edges of the letters or logo. Halo-lit signs are often used for upscale storefronts, corporate signs, hospitality signs, and architectural branding.

Hanging Sign

A hanging sign is a double-faced projecting sign suspended from a bracket, arm, pole, or overhead support. Hanging signs are commonly used for storefronts, sidewalks, pedestrian areas, shopping centers, and interior wayfinding. Also known as a projecting sign.

Ingress Protection / IP Rating

An Ingress Protection rating, or IP rating, describes how well an electrical product is protected against dust and water. The first number refers to protection from solids such as dust, and the second number refers to protection from moisture or water. In outdoor electric signs and LED systems, IP ratings help determine whether components are suitable for weather-exposed sign applications.

Ink Receptive

Ink receptive describes a material surface that can accept, absorb, or bond with ink. Ink receptive materials are important for printed sign faces, banners, vinyl graphics, decals, and digital prints. A compatible ink receptive surface helps improve print quality, adhesion, color consistency, and durability.

Intensity

Intensity refers to the perceived strength or brightness of light from a sign, lamp, LED, or illuminated display. In signage, intensity affects how visible a sign is from a distance and under different lighting conditions. The term can also refer to the saturation or strength of a color.

Interior Signs

Interior signs are signs installed inside a building, facility, office, school, hospital, retail store, restaurant, or public space. They may include wayfinding signs, room signs, directories, ADA signs, lobby signs, wall graphics, safety signs, and branding displays. Interior signage helps people navigate spaces and supports a consistent brand experience.

Internally Illuminated Sign

An internally illuminated sign is lit by a light source contained inside the sign structure. Common examples include light boxes, cabinet signs, illuminated channel letters, pylon signs, and menu boards. Internal illumination helps make sign copy and graphics visible at night or in low-light conditions.

JPEG

A JPEG is a common digital image file format used for photos, web graphics, and sign artwork previews. JPEG files use compression to reduce file size, which can slightly reduce image quality if the file is saved repeatedly or at low quality. For sign production, high-resolution original artwork is usually preferred when printing large graphics.

Kerning

Kerning is the adjustment of space between individual letters so words look balanced, readable, and visually professional. In sign design, poor kerning can make lettering difficult to read or make a brand look unpolished. Proper kerning improves readability on channel letters, dimensional letters, vinyl lettering, printed signs, and digital graphics.

LED

LED stands for light emitting diode. LEDs are widely used in modern illuminated signs because they are energy efficient, long lasting, bright, and available in many colors and color temperatures. LED lighting is common in channel letters, cabinet signs, halo-lit letters, monument signs, pylon signs, and electronic message centers.

Letter Spacing

Letter spacing is the amount of space between letters and words in a sign layout. Good letter spacing improves readability, especially when a sign is viewed from a distance, from a moving vehicle, or in low light. Letter spacing is an important part of sign design, typography, and brand presentation.

Lifetime

Lifetime describes how long a sign lighting component or light source is expected to perform before it becomes too dim or fails. For LED signs, lifetime is often discussed in terms of L70, which means the point when the LED output has declined to 70 percent of its original brightness. Understanding lifetime helps estimate maintenance needs and long-term sign value.

Light Box

A light box is a self-contained sign cabinet that houses internal lighting behind a translucent sign face. Light boxes are commonly rectangular or square, but they can be custom shaped for branding and architectural needs. They are used for storefront signs, wall signs, menu signs, directories, retail signs, and commercial building signs.

Light Reflectance Value / LRV

Light Reflectance Value, or LRV, measures how much visible light a color reflects. A higher LRV means the color reflects more light, while a lower LRV means the color absorbs more light. In sign design, LRV can affect contrast, readability, accessibility, and how colors appear under natural or artificial lighting.

Lightbox Signs

Lightbox signs are cabinet-style signs with a sign face and internal lighting system. They may use acrylic, polycarbonate, flex face material, push-through letters, routed faces, or printed graphics. Lightbox signs are common for interior and exterior business signage because they provide strong visibility and flexible design options.

LM-79 / LM-80 Testing

LM-79 and LM-80 testing are industry lighting tests used to evaluate LED performance, light output, color characteristics, and lumen maintenance. These tests help sign manufacturers and buyers compare LED products more accurately. In illuminated signage, tested components can support better reliability, brightness, and long-term performance.

Lumen

A lumen is a unit that measures the amount of visible light produced by a light source. In signage, lumen output helps determine how bright a sign, LED module, lamp, or illuminated display may appear. The right lumen level depends on sign size, viewing distance, face material, ambient light, and application.

Molded Letter

A molded letter is made by heating acrylic or plastic until it becomes flexible and then forming it into a letter shape using a mold. Once cooled, the material holds its dimensional shape and any excess material is trimmed away. Molded letters can be used for dimensional signs, formed sign faces, and custom illuminated sign components.

Monument Sign

A monument sign is a freestanding ground sign with a low overall height and a solid base or structural frame. Monument signs are commonly used at entrances to businesses, office parks, schools, churches, medical facilities, neighborhoods, and commercial properties. They provide strong identification while blending with landscaping and architecture.

NEC

NEC stands for National Electrical Code. In the sign industry, NEC requirements help guide safe electrical design, wiring, installation, and service practices for electric signs. Compliance with applicable electrical codes is important for illuminated signs, LED signs, neon signs, and other powered signage.

Neon

Neon is a type of illuminated sign technology that uses shaped glass tubes filled with gas and energized by high voltage. Traditional neon signs are known for their bright glow, custom shapes, and classic visual style. Different colors can be created through gas mixtures, phosphor coatings, and colored glass.

Neon Gas

Neon gas is an inert gas used inside glass neon tubes. When an electrical charge passes through neon gas, it produces a distinctive orange-red glow. Other colors in neon-style signs may come from different gases, coatings, or glass colors.

Neon Sign

A neon sign is a sign made with one or more shaped glass tubes illuminated by neon or other gases. The tubes are bent into letters, logos, outlines, or decorative shapes to create a glowing message. Neon signs are often associated with restaurants, bars, retail stores, theaters, and vintage-style branding.

Occupational Safety and Health Administration / OSHA

The Occupational Safety and Health Administration, or OSHA, is the U.S. federal agency responsible for workplace safety and health standards. In the sign industry, OSHA rules can apply to fabrication shops, electrical work, lifting equipment, ladders, cranes, bucket trucks, installation sites, and worker safety procedures. OSHA compliance helps protect sign installers, fabricators, and service technicians.

Opaque

Opaque describes a material that does not allow light to pass through it. In signage, opaque materials are used when light blocking, strong contrast, or solid color coverage is needed. Opaque faces, vinyl, paint, or films can control how illuminated signs appear by preventing unwanted light transmission.

Open Channel Letter

An open channel letter is a dimensional letter without a standard front face, allowing the internal light source to be visible. Traditional open channel letters often used exposed neon, though some designs may use protective clear faces for safety and durability. Open channel letters create a bold, exposed-light appearance.

Pan-Formed Face

A pan-formed face is a plastic sign face molded into a three-dimensional shape. It may include raised, recessed, embossed, or debossed lettering and graphics. Pan-formed faces are commonly used on cabinet signs and illuminated signs to add depth and improve visual impact.

Pantone Matching System / PMS

The Pantone Matching System, or PMS, is a standardized color system used to communicate and match specific colors in printing, branding, and manufacturing. In sign production, PMS colors help designers, clients, and fabricators maintain brand color consistency across printed graphics, painted signs, vinyl, and other materials. PMS references are especially helpful when matching corporate logos and identity standards.

Permit

A permit is official approval from a local government or authority allowing a sign to be installed, modified, relocated, or erected. Sign permits may depend on sign size, height, placement, illumination, zoning district, construction method, and local sign code requirements. Many exterior signs require permit review before installation.

Photocell

A photocell is a light-sensitive control that automatically turns a sign on or off based on surrounding daylight. In signage, photocells are often used as dusk-to-dawn controls for illuminated signs, parking lot signs, cabinet signs, and building signs. A photocell can help save energy and keep signs operating at the right time.

Pole Signs

Pole signs are freestanding signs mounted on one or more visible support poles. They are often used near roads, highways, parking lots, shopping centers, gas stations, restaurants, and commercial properties where long-distance visibility is important. Pole signs may be illuminated, non-illuminated, single-faced, or double-faced.

Polycarbonate / PC

Polycarbonate, often abbreviated PC, is a strong thermoplastic material used for sign faces and protective panels. Known by brand names such as Lexan and Makrolon, polycarbonate is impact resistant, formable, and suitable for many sign applications. It is often chosen where durability and break resistance are important.

Pre-Assembled

Pre-assembled describes a sign component, letter, or logo that arrives with major parts already assembled, such as the letter body, face, and LED lighting. Pre-assembled sign components can speed up installation because less assembly is required in the field. Final electrical connections may still need to be completed by the installer or electrician.

Preformed / Notched

Preformed or notched refers to a manufacturing method where material is shaped or machine-notched before assembly. In channel letter and box sign fabrication, notching helps form returns, corners, bends, and edges more accurately. This process can improve consistency and efficiency in sign production.

Prewired

Prewired means a sign, letter, or illuminated component has already been wired before shipment or installation. A prewired sign may include LEDs, internal wiring, and a whip or lead ready for final electrical connection. Prewiring can reduce installation time and help standardize electrical assembly.

Pylon Signs

Pylon signs are tall freestanding signs supported by a visible structure, often used where high visibility from roads or highways is needed. They may be internally illuminated, externally illuminated, single-faced, double-faced, or multi-tenant. Pylon signs are common for shopping centers, hotels, dealerships, restaurants, gas stations, and commercial developments.

Raceway

A raceway is an electrical enclosure that can also serve as a mounting structure for channel letters, logos, or other sign components. Raceways contain wiring and electrical parts while reducing the number of wall penetrations needed for installation. They are often used when direct mounting individual letters is not practical or when a cleaner electrical installation is needed.

Readability

Readability is how easily and quickly a viewer can understand the message on a sign. Factors that affect readability include letter size, font style, spacing, color contrast, lighting, layout, sign height, viewing distance, and traffic speed. A readable sign helps customers identify a business, navigate a property, or absorb information without confusion.

Remote

Remote describes channel letters or logos installed directly to the building fascia or mounting surface without a raceway or wireway. Remote-mounted letters often provide a clean, individual-letter appearance. This installation style may require more wall penetrations and careful coordination of wiring behind the mounting surface.

Resolution

Resolution describes the amount of image detail in digital artwork, printed graphics, display screens, or plotted production files. In digital images, higher resolution usually means more pixels and sharper output. For sign printing, proper resolution is important so large graphics, photos, logos, and wraps do not appear blurry or pixelated.

Returns

Returns are the side walls of a channel letter or fabricated letter. The return depth affects the letter’s thickness, structural strength, appearance, and lighting performance. Returns are commonly made from aluminum or other sign fabrication materials.

Reverse Channel Letter

A reverse channel letter is a fabricated dimensional letter with an opaque front and side walls, designed so light exits from the back or around the rear edge. This creates a halo lighting effect on the wall or mounting surface. Reverse channel letters are often used for professional, architectural, and upscale business signs.

Roof Sign

A roof sign is a sign installed on, above, or directly attached to a building roof. Roof signs can provide visibility from long distances or over surrounding structures, but they often require careful engineering, permitting, and compliance with local sign codes. Structural support, wind load, and access for maintenance are important considerations.

Routed Signs

Routed signs are signs made by cutting into or through a solid material using a router, often a CNC router. Materials may include wood, HDU, acrylic, PVC, aluminum composite, or other sign substrates. Routed signs can have recessed lettering, raised graphics, cut shapes, or precision-cut dimensional details.

Sandblasted Signs

Sandblasted signs are made by applying a stencil to a material, then blasting away the exposed surface with high-pressure abrasive media. This creates a textured background while leaving lettering or graphics raised. Sandblasted signs are popular for rustic, dimensional, residential, park, resort, and handcrafted-style signage.

Seam

A seam is the line where two pieces of material meet or are joined together. Seams may appear in flexible sign faces, vinyl graphics, banners, metal panels, plastic sheets, or fabricated sign components. Proper seam placement and finishing help improve appearance, strength, and weather resistance.

Self-Contained

Self-contained describes a channel letter or logo where the power supply or electrical components are located inside the letter or sign component itself. This can simplify certain installations and reduce the need for separate remote power supply enclosures. Self-contained designs still require proper electrical planning, ventilation, and service access.

Serif

A serif is a small decorative stroke or projection at the end of a letterform. Serif typefaces can create a traditional, formal, or classic appearance in sign design. Letter style affects readability, brand personality, and how well a sign can be read from a distance.

Sheet Metal

Sheet metal in signage refers to metal material formed into sign cabinets, channel letters, raceways, pans, backs, returns, and structural components. Sheet metal fabrication may include cutting, bending, welding, forming, and finishing. It is an important part of custom sign manufacturing for durable commercial signs.

 

Sidewalk Sign

A sidewalk sign is a movable freestanding sign placed on a sidewalk, walkway, or entry area. Many sidewalk signs are A-frame or sandwich-board style signs used for retail promotions, restaurants, directions, or temporary messages. Because they are portable, local rules may limit where and when they can be used.

Sign

A sign is any device, structure, display, graphic, or placard used to attract attention, identify a business, advertise products or services, provide directions, or communicate information. Signs may be interior or exterior, illuminated or non-illuminated, permanent or temporary. In commercial settings, signs are one of the most important tools for visibility, branding, and customer communication.

Sign Cabinet

A sign cabinet is the enclosure or box structure of an electric sign. It typically holds the sign face, frame, lighting, wiring, and service access components, depending on the design. Sign cabinets are used in light boxes, wall signs, pole signs, pylon signs, and other illuminated signs.

Sign Can

A sign can is an informal industry term for a sign cabinet or box sign enclosure. It usually refers to the metal body that houses the sign face, lighting, wiring, and internal components. Sign cans are common in cabinet signs, lighted wall signs, and freestanding illuminated signs.

Sign Code

A sign code is a set of local rules that regulates the size, placement, height, lighting, construction, appearance, and sometimes the operation of signs. Sign codes are usually created by municipalities, counties, or other governing bodies as part of zoning or land-use regulations. Understanding the sign code is important before designing, fabricating, permitting, or installing an exterior sign.

Sign Face

A sign face is the visible surface of a sign that displays the message, logo, graphics, or business identity. Sign faces may be made from acrylic, polycarbonate, aluminum, flex face material, vinyl, routed panels, or printed substrates. Also called the face or panel of the sign.

Signage

Signage is the general term for signs used to communicate identity, advertising, directions, warnings, instructions, or information. A signage system may include exterior signs, interior signs, wayfinding signs, regulatory signs, wall signs, monument signs, and vehicle graphics. Good signage helps people notice, understand, and navigate a business or property.

Spacer

A spacer is a mounting device used to separate a sign, letter, or panel from the surface behind it. Spacers create depth, shadow, and a pinned-off appearance for dimensional letters, plaques, acrylic panels, and architectural signs. They can also help with alignment and airflow depending on the sign design.

Specifications

Specifications are written project requirements that describe the materials, fabrication methods, finishes, installation procedures, quality standards, and performance expectations for a sign project. Sign specifications may follow construction formats such as CSI sections and are often used by architects, designers, contractors, and owners. Clear specifications help ensure that the finished signage matches the approved design intent.

Stroke

A stroke is a line or major part of a written, printed, or fabricated character. In sign design, stroke width affects readability, visual weight, fabrication options, and lighting performance. Thin strokes may be harder to fabricate or read at a distance, while heavier strokes can improve visibility.

Supports

Supports are components used to hold neon tubes, sign parts, or structural elements in the correct position. In neon signs, supports keep glass tubes away from the background surface and help protect them from impact or vibration. In broader signage, supports may also refer to poles, brackets, frames, or mounting structures.

Tensile Strength

Tensile strength is the maximum pulling force a material can withstand before breaking. In signage, tensile strength can matter for banners, flex faces, cables, fasteners, adhesives, and structural materials. Understanding tensile strength helps ensure that sign materials are suitable for wind, weight, tension, and installation conditions.

Thermoforming

Thermoforming is a manufacturing process that heats a flat sheet of plastic until it becomes pliable, then forms it into a three-dimensional shape using a mold. In sign making, thermoforming is used for formed faces, pan faces, molded letters, and dimensional plastic sign components. Also related to vacuum forming.

TIFF

A TIFF, or Tagged Image File Format, is a high-quality graphics file format often used for scanned images, print files, and production artwork. TIFF files can preserve more image detail than heavily compressed formats. In sign production, TIFF files may be used for large-format printing, photographic graphics, and high-resolution artwork.

Time Switch

A time switch is a timer-based control that turns electric signs on and off at scheduled times. Time switches can help manage energy use and keep illuminated signs operating during business hours or nighttime visibility periods. They are commonly used for cabinet signs, pylon signs, wall signs, and other electric signage.

Transformer

A transformer is electrical equipment that changes voltage or current from one level to another. In traditional neon signs, transformers are required to provide the high voltage needed to illuminate neon tubing. In modern sign systems, other power conversion devices such as LED power supplies may be used depending on the lighting technology.

Translucent

Translucent describes a material that allows light to pass through but does not allow clear images to be seen through it. Translucent vinyl, paint, acrylic, and polycarbonate are commonly used on internally illuminated signs so the graphics light up evenly. Translucency is important for cabinet signs, channel letter faces, light boxes, and backlit graphics.

Transparent

Transparent describes a material that allows light and images to pass through clearly. Transparent materials may be clear or tinted and are used when visibility through the material is desired. In signage, transparent films, acrylic, or protective faces may be used for displays, windows, overlays, and specialty sign designs.

UL

UL stands for Underwriters Laboratories, a Nationally Recognized Testing Laboratory. In the sign industry, UL listings and labels can indicate that electrical sign products or components have been evaluated for safety standards. UL recognition is important for many electric signs, illuminated signs, and sign installations.

Variance

A variance is formal permission from a government body to deviate from a specific zoning or sign code requirement. A sign variance may be requested when strict enforcement of the rule would create hardship or when site conditions are unique. Variances may involve sign height, size, location, illumination, setback, or other regulated factors.

Vehicle Graphics

Vehicle graphics are signs, decals, lettering, logos, or printed graphics applied to cars, trucks, trailers, vans, fleets, boats, or other vehicles. Vehicle graphics turn transportation equipment into mobile advertising and brand identification. They may include simple vinyl lettering, spot graphics, partial wraps, or full vehicle wraps.

Vehicle Wraps

Vehicle wraps are large vinyl graphics printed and applied over part or all of a vehicle’s exterior surface. A wrap can create the look of a custom paint job while allowing the graphic to be removed later without permanently changing the vehicle finish when properly installed and removed. Vehicle wraps are widely used for business advertising, fleet branding, promotional vehicles, and mobile marketing.

Vinyl

Vinyl is a flexible PVC film used in sign making for cut lettering, decals, graphics, wraps, window signs, banners, and decorative applications. Many sign vinyl products have pressure-sensitive adhesive backing so they bond to surfaces when applied correctly. Vinyl is available in many colors, finishes, adhesive types, and durability levels for indoor and outdoor signage.

Vinyl Graphics

Vinyl graphics are adhesive-backed letters, logos, decals, printed images, or cut designs made from vinyl film. They can be applied to windows, walls, floors, vehicles, displays, sign faces, and panels. Vinyl graphics are a versatile choice for branding, promotions, wayfinding, storefronts, and vehicle advertising.

Vinyl Letters

Vinyl letters are individual letters cut from adhesive-backed vinyl material. They are commonly used for window lettering, door lettering, vehicle lettering, temporary signs, business hours, decals, and simple sign messages. Vinyl letters are available in opaque, translucent, metallic, transparent, and specialty finishes.

Visibility

Visibility is the ability of a sign, letter, number, graphic, or symbol to be seen and recognized against its surroundings. Visibility is affected by size, placement, contrast, lighting, viewing distance, speed of traffic, obstructions, and background conditions. Good sign visibility helps customers locate a business and understand the message quickly.

Wall Mounted Signs

Wall mounted signs are signs attached directly to a wall or building surface. They may include channel letters, cabinet signs, dimensional letters, routed signs, plaques, panels, or illuminated signs. Wall mounted signs are one of the most common forms of business identification for storefronts, offices, retail buildings, and commercial properties.

Wall Signs

Wall signs are signs installed on or painted directly onto a wall. The term often includes fascia-mounted signs, wall-mounted cabinet signs, channel letters, dimensional letters, and flat panels attached to the building exterior. Wall signs help identify a business from the front of a building and are often regulated by local sign codes.

Water Proof

Water proof means impervious to water for as long as the material remains intact. In signage, this term should be used carefully because many materials are water resistant rather than fully waterproof. For treated fabrics and flexible materials, water resistant is often the more accurate description unless the material truly prevents all water passage.

Water Resistant

Water resistant describes a sign face, material, coating, or component designed to resist damage or deterioration from moisture. Water resistant materials are important for outdoor signs, banners, flex faces, electrical components, and weather-exposed installations. Water resistance does not always mean the material is fully waterproof.

Weeding

Weeding is the process of removing excess vinyl from a plotter-cut

Weld

A weld is a joint created by heating materials until they fuse together. In sign fabrication, welding is used to connect metal parts such as sign frames, cabinets, supports, brackets, poles, and structural components. Proper welding helps create strong, durable sign assemblies.

Window Sign

A window sign is a sign displayed on, behind, or within a window so it can be viewed from outside. Window signs may include vinyl lettering, printed graphics, decals, perforated window film, posters, LED displays, or temporary promotional signs. They are commonly used for business hours, branding, sales messages, privacy graphics, and storefront advertising.