Glossary of Label Terminology
Glossary of Terms PDF Print E-mail
AB Coating: Anti-block coating is applied to the non-release coated side of the liner to prevent ink transfer to the backside of the liner. It is generally used with film face materials or heavy adhesive coat weights.
Abrasiveness: The tendency of a paper, paper coating, or ink to abrade or dull die edges, slitting blades, and printing plates due to friction.
Accelerated Aging: Test procedures for subjecting pressure sensitive label material to special environmental conditions in order to predict the course of natural aging in a far shorter period of time.
Acetates: Transparent and cellulose films used as face materials; cellulose is a plant product.
Acrylic Adhesive: See: Adhesive: Acrylic.
Acrylic Based Adhesive:.See: Adhesive: Acrylic Based
Adhesion: A bond established upon contact between two surfaces. Can measure how well an adhesive/label sticks to a product, or how well an ink or varnish sticks to the substrate.
Adhesive Deposit / Adhesive Residue: The pressure sensitive adhesive remaining on a substrate when a label is removed.
Adhesive Ooze: The adhesive migration from pressure sensitive material and labels. Often caused by tight roll tension, complex die-cutting, or some film applications. Note: Especially critical in laser printing and high-speed application of small labels.
Adhesive Splitting: A condition in which portions of pressure sensitive adhesive remain on the face material and portions remain on the substrate when the label is placed under stress or removed. See also: Cohesive Failure.
Adhesive: A substance capable of holding materials together by surface attachment.
Adhesive: Acrylic A pressure sensitive adhesive based on high-strength, acrylic polymers. It can be coated as a solvent or emulsion.
Adhesive: Cold Temperature: An adhesive that adheres to refrigerated or frozen substrates (generally +35 degrees F or colder). Sometimes the terms "ALL TEMP" or "FREEZER GRADE" are used to refer to specific temperature requirements.
Adhesive: High Temperature: An adhesive that withstands sustained, high temperature (+200 degrees F or higher).
Adhesive: Hot Melt: A pressure sensitive adhesive that is applied to the release liner at a high temperature and then cools into a highly-tacky PS adhesive.
Adhesive: Opaque: A darkened adhesive that restricts printing from showing through the adhesive-coated side of a label. Opaque adhesives are often used as "cover-up labels".
Adhesive: Pattern Coated: Refers to the spacing arrangement of areas of adhesive on the face material that are coated parallel to the machine direction. Also referred to as dry lap, strip coated, or zone coated adhesive.
Adhesive: Pattern Gummed: An adhesive coating that alternates strips of adhesive with non-adhesive areas that is applied parallel to the machine direction. The non-adhesive areas of the label are frequently used as lift tabs for order picking labels.
Adhesive: Permanent: A pressure sensitive adhesive characterized as having relatively high ultimate adhesion to a wide variety of substrates. The label either cannot be removed intact or requires a great deal of force to be removed.
Adhesive: Removable: A pressure sensitive adhesive characterized by low ultimate adhesion. The label can be removed from most substrates without damaging the surface or leaving adhesive residue or stain. Extensive testing is recommended for all "removable" adhesives – many become permanent under adverse conditions.
Adhesive: Rubber Based: A pressure sensitive adhesive derived from natural or synthetic rubbers.
Adhesive: Water Soluble: A pressure sensitive adhesive in which all components are water soluble. Can be soaked off, sometimes under specific temperature conditions.
AM Screen:Amplitude Modulated screening. Uses dots that are equidistant, but of varying size, to generate a printed image.
Anchorage: The specific adhesion of a pressure sensitive material to a substrate. See Adhesion.
Anilox:An anilox roll is used in flexographic printing to meter the amount of coating or ink delivered to the printing plate. Each anilox can deliver a specific amount of ink, based on it’s cell volume. Changing anliox roll can deliver more or less ink, thus changing ink density.
ANSI: The American National Standards Institute. A non-governmental organization responsible for the development of voluntary industry standards.
Anvil Cut Labels: Pressure sensitive labels that are die cut through all components of the label stock, including the liner. Also called steel-to-steel, zero tolerance, punched out, metal-to-metal, or blanked out labels.
Anvil: A hardened steel roll upon which the bearers of a rotary die cutter ride which also provides the hardened surface to support the die cutting.
Application Temperature: Temperature of a label material at the time of application. All adhesives have a minimum application temperature rating. Testing is recommended in minimum and maximum application temperature situations.
Application: (1) Placement of a label on a substrate. (2) The conditions under which a label is to be used; the life-cycle of the label.
Applicator: A device that automatically feeds and applies pressure sensitive labels to a substrate or product.
Backing: See: Carrier, Liner, Release Liner.
Bar Code / Bar Code Symbol: A specific pattern made of lines (or bars) and spaces, of varying width, which represent alpha or numeric data in machine-readable form. The most general format for a bar code consists of: a lead margin, a start character, data or message characters, a stop character, and a trailing margin. There are many bar code symbologies. The code can be "static" (the same on every label) or "variable" (changes either consecutively or based on programming). Code 128 and Code 39 are very popular symbologies.
Barrier Coat: A coating applied to a face material on the side opposite the printing surface that lies between the material and the adhesive coat. It provides increased opacity to the face material, and/or prevents migration of adhesive to the face material, and/or improves anchorage of adhesive to the face material.
Basis Weight: The weight in pounds of a ream (either 480 or 500 sheets) of paper cut to a given size. See also: Substance/Substance Number.
Battery Label Stock: A durable, acid-resistant label material designed for the demanding environment associated with automotive batteries.
Biaxially-Oriented Stock: Raw material label stock, usually films, that have been stretched in both the machine and transverse directions.
Bleed: When the printed area extended beyond the trim edge (or off the edge of the die-cut).
Blocking: Adhesion between sheets or rolls of pressure sensitive labels usually due to cold flow, improper drying of inks, or improper curing of coatings and adhesives.
Blown-On Application: A method of label application in which the label is transferred onto a vacuum plate, then blown onto the product surface.
Brightness: The (blue light) reflectivity of a sheet of paper measured under standardized conditions on an instrument designed and calibrated specifically for that purpose.
Butt-Cutt Labels: Rectangular, square-cornered labels in continuous form that are separated by a single knife cut to the liner. There is no gap between the labels on the liner. Typically, the matrix is not removed.
Calender Finish: A term applied to a paper with a glazed surface finish created by means of calenders (cast iron rollers with chilled, hardened surfaces). Other terms include machine finish, English finish, super-calendered and calender friction glazed. Semi-gloss litho and high gloss paper are examples of calendered paper.
Caliper: The thickness of a sheet of paper or plastic measured in units of one thousandth of an inch; the measuring units are called mils or points. Can be measured with a "caliper gauge".
Carrier:.See: Backing, Liner, Release Liner
Cast-Coated Paper: A paper coating which is allowed to harden or set while in contact with a finishing surface. In general, cast-coated papers usually have a high gloss finish.
cGMP:Current Good Manufacturing Practices. GMP’s are standard guidelines set out by the FDA to ensure that manufacturing is carried out in safe and quality processes, to avoid contamination and ensure repeatability. GMP regulations are specific to each industry: food, drug, etc.
Clay-Coated Paper: A paper that is coated with a clay substance on it’s surface.
Clear Coat: A coating that protects the printing and the surface of a pressure sensitive label from abrasion, sunlight, chemicals, moisture, or any combination of these. Varnish and lacquer are examples of clear coats. See also: Lacquer, Overcoat, Protective Coating, Varnish.
Coat Weight: The amount or weight of coating per unit area. This is expressed in various units including grams per square meter or pounds per ream. Applies to adhesives, primers, varnishes, and lacquers.
Cohesion: The internal strength of a pressure sensitive adhesive, its resistance to cold flow, and its resistance to failure (or splitting) when labels are removed or placed under stress.
Cold Temperature Adhesive: See: Adhesive: Cold Temperature.
Color Separation: The process of separating a color image into its component primary printing colors.
Colorfastness: The ability of a pressure sensitive label to retain its true color under normal conditions and/or to resist change in color when exposed to light, heat, or other influences. "Fade Resistance" is a complimentary terminology. Material selection, ink type, and printing method all affect outdoor performance.
Computer Imprintable Labels: Typically, pre-printed or imprinted utilitarian labels carrying variable information, such as a bar code, price.
Conditioning: The process of subjecting a material to specific temperatures and relative humidity conditions for a stipulated period of time. (American Society of Testing Material)
Conformability: The ability of a pressure sensitive label to yield to the contours of a curved or textured surface. See also: Flexibility, Pliability.
Copy Position:A standard that clarifies the orientation of the label as it comes off the roll. See the Client services area of our website for a Copy Position Chart.
Core/Core Size: Refers to the diameter of the (cardboard) core in a roll of labels.
Coupon Base: The clear base in a dry peel label construction. Usually used for instantly redeemable coupons, the clear base is combined with a face material in a specialized laminating process. When the printed face material ( or coupon) is removed, the clear base remains on the substrate. See also: Dry Peel.
Crazing: The network of small cracks that can appear in a varnish coat or plastic face material. They are usually caused by expansion and contraction during weathering or by excessive solvents in an ink system. See also: Checking.
Creep: The lateral movement of a pressure sensitive label on a surface due to low cohesive strength.
Cross Web: See: Cross-Direction.
Cross-Direction: The direction perpendicular to the machine direction in the plane of a printing material. See also: Cross-Web.
CSA: Canadian Standards Association.
Curl: The tendency of paper to bend or warp, either by itself or because of a coating or lamination.
Cylinder: In flexography, most rollers in the printing press are called rolls with the exception of ones on which the rubber plates are mounted, and the one which receives the impression. These are usually referred to as cylinders, i.e., plate cylinder, impression cylinder.
Deboss: Condition in which an image is depressed below the normal surface of a material. Embossing has the opposite effect, creating a raised image.
De-lamination: The separation of a material into layers – partial or complete. Often seen when a laminate material separates from the base stock, or when layers of co-extruded films come apart.
Die Cut Label: Pressure sensitive labels on a release liner where the matrix, or waste between the labels, usually has been removed.
Die Cut: The actual shape of a pressure sensitive label made by the cutting edge of a die.
Die Stain: Used to check die cutting accuracy. Done with diluted ink applied to the cut surface. The ink will wick to any fractures of the silicone-coated surface.
Die: The tool or device used for imparting or cutting a desired shape, form, or finish from a given material. The cutting die has a limited use life, but can be "re-tooled" or "sharpened" several times prior to the failure of the tool.
Digital Printing: Generic term referring to printing without the use of conventional plates or platemaking. Typically a direct-to-substrate method, where a computer directly drives the printing device. Examples of digital printing are thermal transfer, direct thermal, ion deposition, digital offset, and ink-jet.
Dimensional Stability: The property of a material which relates to the degree of its ability to retain (or recall) its original shape or state. See also: Memory.
Direct Thermal printing: A specialized printing technology that uses rapidly-heated pins that selectively activate a heat-sensitive coating inherent in the face material, thus forming the desired copy or images.
Dispenser: A device that feeds pressure sensitive labels, either manually or automatically, in pre-determined units. Dispensers in box form can serve as containers for a roll of labels.
Dots: See: Print Resolution.
DPI: Dots per inch; a measure referring to dot resolution in images created by dot matrix, laser, and thermal printers and imprinters.
Dry Release: A label construction in which two materials are bonded together with a dry adhesive. The top ply of the construction can be removed with no adhesive residue. the bottom ply is typically made of a clear material, so the substrate can be seen through it. A common use of this label construction is for instantly redeemable coupons or for promotions. See also: Coupon Base, Dry Peel.
Dwell / Dwell Time: (1) The time during which a pressure sensitive material remains on a surface before testing for adhesive permanence or removability. (2) The time during which a hot-stamp, embossing head, or thermal die remains in contact with the surface of a material during printing.
Edge Lift: The tendency of the edge of a label to rise off the substrate. This condition occurs most frequently on small diameter, curved substrates. Resistance to edge lift is dependent on the bond strength of the adhesive and the flexibility of the face material.
EDP / Electronic Data Processing: Data processing by electronic equipment. Pressure sensitive labels produced for imprinting are sometimes blanks with die-cut, but often have base colors printed.
Emboss / Embossing: A condition in which an image is pressed into a material to create an image that is raised above the normal level of the material. Debossing creates the opposite effect.
Emulsion System: A dispersion of fine particles or globules in another liquid. Many pressure sensitive adhesives are emulsion system adhesives.
Exposure Temperature: The temperature to which a labeled product is exposed. See: Service Temperature.
Face Cut Label: A die cut or square cut label from which the matrix, or waste between labels, has not been removed.
Face Material / Face Stock / Substrate: Any paper, film, fabric, foil, or plastic material suitable for converting into pressure sensitive labels. In a finished construction, the face material is bonded to an adhesive layer and carried on a liner. It is the functional part of the construction.
Fade / Fading: A gradual decrease in brilliance of color; often applies to the change in color produced by prolonged exposure to light.
Fan-Fold / Fan-Folded Labels: Pressure sensitive labels on a continuous backing that is perforated, then folded back and forth along the perforations, so as to create a flat pack.
FDA / Food and Drug Administration: Specific regulations pertain to manufacturing of food and beverage, meat, OTC, and drug products.
Film: (1) Plastic face material manufactured from synthetic high molecular weight polymers. Examples are: Kimdura®, polyester, polyethylene, and vinyl, polypropylene, and styrene. (2) The art image created, similar to a photography negative, that is used to create a printing plate.
Finish: The surface property of a paper sheet determined by its surface contour and gloss. Terms referring to paper finish include: antique, eggshell, vellum, machine, English, super-calendered, and plate.
Fish Eyes: Round or eye-shaped deformations in a coating or lamination.
Flag: A marker, usually made of strips of colored paper, placed in rolls of pressure sensitive materials during printing (or converting) to designate a deviation from a standard -- such as a splice, defect, or specification change. It can also mark a specific length.
Flexibility: A property of face material, measured under specified conditions, that indicates how readily it will conform to curved surfaces. See also: Conformability, Pliability.
Flexography: A rotary web method of printing characterized by raised-image, flexible rubber plates and fast-drying inks.
Fluorescent Paper: A paper coated with a pigment which reflects light in such a way that it has a glowing appearance or effect.
FM Screen:Frequency Modulated screening. Uses dots that are the same size, but varying in density to generate a printed image.
Foil Paper Laminate: A face material consisting of metal foil laminated to paper. The foil usually carries a clear coat to improve ink receptivity.
Foil: A thin metal sheet used as a face material, or as a transfer material for hot stamping onto a substrate.
Folded CouponsPromotional labels manufactured by printing multiple webs in-line, and laminating them together. Delivered on a pressure-sensitive web for high-speed application.
Food Contact Adhesives: Adhesive meeting specified sections of the Food and Drug Administration Code of Federal Regulations. These regulations cover direct food labeling as well as incidental contact. Special product recommendations are necessary for specific applications.
Four Color Process Printing: Printing and reproduction of full color images using the four process printing colors -- yellow, cyan, magenta, and black -- to create an image with an infinite number of resultant colors. Also called CMYK, or "full color".
Freezer Grade Adhesive: See: Adhesive: Cold Temperature.
Gear Marks:Gear marking occurs when the "chatter" of physical gears cause irregular lay-down of ink on the substrate – which appears as lines across the printed web.
Ghosting: Indistinct image patterns appearing as solids or reverse printing, often caused by ink curing issues, transfer or offsetting onto rollers.
Gloss Paper: See: Cast-Coated Paper.
Gloss: That property of a surface which causes it to have a mirror-like finish or the ability to specifically reflect light.
Gravure Printing: A printing process employing minute engraved wells. In general principle, the deeply-etched wells carry more ink than a raised surface, and, therefore, print dark values. Shallow wells print light values. A scraping device, called a doctor blade, wipes excess ink from the cylindrical printing surface before the ink is pressed into the face material. Rotogravure employs etched cylinders and web-fed stock.
Heavy Coat Weight: A higher -than-standard weight of coating per unit area.
High Gloss Paper: A cast-coated gloss paper that features high strength material and excellent ink receptivity.
High Temperature Adhesive: See: Adhesive: High Temperature.
Hot Stamping: An image producing method that involves a film carrying a thin leaf of color which is transferred to a material using heat and pressure. It is commonly used with gold or metallic leaf, but many colors, patterns, and finishes of leaf are available.
Hybrid Screen:Mixes AM and FM graphics to optimize a printed image.
Impression: The adjustment of the plate / cylinder to the substrate to achieve the desired print quality.
Imprinting: Technique in which copy is applied to blank or previously printed labels with a secondary printing device such as dot matrix, thermal transfer, direct thermal, and laser.
Ink Jet Printing: A non-impact printing process whereby fluid ink is projected from a nozzle directly onto a material to form the desired image.
Ion Deposition Printing: An electronic printing process whereby a static charge is created on a printing cylinder, attracting toner. The toner is subsequently transferred to a printable surface, creating the image. See also: Electrostatic Printing, Laser Printing. As a digital printing method with computer generation, each label can be different than the previous. Consecutive or variable barcodes or images can be generated.
IRC:Instant-Redeemable Coupons. Printed coupons intended for retail redemption by consumers. "Peel-off" or "Dry-Peel" coupons leave no residue on the product or coupon, and can be placed into cash registers by the retail clerk.
ISO:ISO 9000 is a generic name given to a family of standards developed to provide a framework around which a quality management system can effectively be implemented. Internal and external auditing is used for continuous improvement and documentation.
Label Across / Label Width: The measurement of a label across the roll, or across the machine web direction.
Label Around / Label Length: The measurement of a label around the roll, or in the machine web direction.
Label Gap:The space between labels, either in the machine direction or across the web. This area between die cavities is often cut out as the "matrix" or waste trim.
Label Repeat Length:The distance from the top of one label to the top of the next label on a roll. Includes the label length and the gap between labels.
Label: The functional portion of a pressure sensitive construction comprised of the face material and adhesive, cut into various shapes.
Laminate: The process of bonding two or more materials together.
Lamination: A secondary material, typically a clear film, laminated to the base material as a form of barrier protection.
Laser Printing: Also known as electro-photographic printing, a process where light, generated from either a laser or diode, creates a static charge on a photographically-sensitive cylinder. The charged cylinder attracts toner, which is subsequently transferred to a printable surface, creating an image.
Latex Paper / Latex-Impregnated Paper: Paper saturated with latex during its formation making it stronger, more resistant to moisture and abrasion, more flexible, and more durable.
Layflat: A label material with good non-curling characteristics that make it suitable for a flat sheet.
Legging / Legs: The stringy appearance of adhesive when a pressure sensitive label is separated from a substrate or its release liner. It can also occur when the matrix is removed from a die cut pressure sensitive material.
Letterpress Printing: A printing process in which ink is applied to a material from the raised portions of printing plates or from foundry type.
Lexan: General Electric Company’s trademark for polycarbonate film.
Lift Tab: A label edge that is not coated with adhesive and , thereby, allows for easy removal of the label from the release liner. It is frequently used for order picking labels.
Line Art: Artwork that can be created with solid ink color, lacking any screens.
Liner – 44PK44 pound Poly-coated Kraft paper. Used in demanding die-cutting applications.
Liner – GlassineLiner made of super-calendered, dense transparent or semi-transparent material manufactured primarily from chemical wood pulps, which have been beaten to secure a high degree of density in the stock.
Liner – LayflatA liner resistant to curl – optimized for sheeted applications.
Liner – PETPolyester liner. A clear film liner that gives the substrate a very smooth adhesive coating. Used in no-label look applications. Also selected because of the durable nature of PET (more forgiving die-cut).
Liner – SCKSuper-calendered Kraft paper liner.
Liner: A paper or film that is a carrier for pressure sensitive labels. Typically, it has a silicone coating to allow easy removal of the label. See also: Backing, Carrier, Release Liner.
Lithographic Paper: A paper suitable for lithographic (or offset) printing.
Long Term Bond: The bond formed by an adhesive 24 after label application. Also referred to as Ultimate Adhesion.
Machine Direction: The direction of paper in its forward movement through a paper handling machine or printing press.
Machine Finish: See: Calendar Finish.
Magnetic Die: Abbreviated to "Mag Die", a thin flexible steel cutting tool that is held onto a base cylinder magnetically. Less expensive than a metal-engraved cutting die, therefore ideally suited for short run and digital applications.
Make Ready: For printing presses, all operations and waste prior to running production. These preparatory operations are also called "Set-up".
Matrix: The face material and adhesive layers of a pressure sensitive construction surrounding a die cut label which is typically removed after die cutting.
Matte Litho: A litho paper with a satin finish -- between high gloss and dull finish -- that is ideal for bar code printing.
Memory: The property of a material that causes it to shrink or return to its original dimensions after being distorted, die cut, or subjected to temperature change. For example, vinyl (being very flexible) has more memory than polystyrene.
Metalized Film: A plastic or resinous film that has been coated on one side with a very thin layer of metal.
Metalized Paper: Paper that has a thick deposit of metalized particles that resemble a layer of foil. Metalized paper offers reduced stiffness and better flexibility than metalized film and has an appearance similar to laminated foil papers.
Mottled Surface / Mottling: Non-uniform appearance or coloring of a face material -- blotching.
Multiple-Ply Construction: A construction consisting of two or more face materials and/or adhesives on the same liner. Folded coupons, IRC’s, and piggyback labels are multiply-ply applications.
Offset Printing: A printing process in which a right-reading image is printed from a plate onto a blanketed cylinder. the mirror image is then pressed against a printing surface, thus creating the desired, final image. The term offset applies because the printing plate never comes in contact with the printing material as it does in letterpress printing.
Opacity: the measure of the amount of light that can pass through a material. For clear materials, often refers to the thickness or density of the inks.
Orange Peel: The mottled or textured appearance of a label that can occur from air bubbles trapped between a laminate and face material.
Overlaminate / Overlaminating / Overlamination: The application of a clear film to label material for the purpose of protection or to enhance visual quality.
Peel Adhesion: Peel adhesion is the force required to remove a pressure sensitive label from a standard test surface at a specified angle and speed after the label has been applied according to specified conditions. See also: Adhesive Strength.
Perforation: Refers to a series of small incisions made in a material to facilitate tearing or folding along a pre-determined line. "Cuts" are the slits, and "Ties" are the connectors. Perforations are described with TPI's - ties per inch.
Piggyback: This type of label consists of a pressure sensitive label on a pressure sensitive liner. This double-ply label is carried on a standard release liner. Once the double-ply is applied to a substrate, the top ply can be removed and applied to yet another substrate. Typically this kind of label is used for response labels in direct mail promotions. A label can be removed from the mail piece, and replaced onto another area.
Pigment: Finely ground solid particles of color, used in ink to deliver the color.
PMS:Pantone Matching System (PMS), a proprietary color space used in a variety of industries, primarily printing, though sometimes in the manufacture of colored paint, fabric and plastics.
Polyester: A strong film that is resistant to moisture, solvents, oils, and chemicals. It is usually transparent, but is available with a metalized finish. Mylar® is a polyester brand name.
Polyethylene: A tough, stretchy film that is suitable for use in low temperature applications. It is frequently used for labeling semi-rigid bottles.
Polypropylene: Similar to polyethylene but stronger and having a higher temperature resistance. Various thermoplastics are polymers of propylene; excellent clarity. Also used in various thickness in the printing of labels as well as backing or liner materials. A common printing substrate is bi-axially oriented PP, or BOPP.
Polystyrene: A thermoplastic with outstanding insulation properties and resistance to moisture. Often used as a base layer for promotional labels (IRC’s, etc). It is a hazy-clear film with poor printability.
POP:Point of Purchase – referring to the retail location where a consumer makes a purchase decision. Often retail shelf or check-out location.
Pressure Sensitive Label: A self-adhesive label that is the die cut, usable part of pressure sensitive material that has been converted through roll-fed production equipment. The end product can be produced in rolls, sheets, or fan-folded stacks.
Prime Label / Primary Label: Usually a descriptive, decorative product label; the label typically on the front of a container.
Primer: A coating applied to face material, on the side opposite the printing surface, to improve anchorage of the adhesive and to prevent migration of adhesive components into face material.
Print Resolution: The quality of print; the level of detail achieved by a printer. Measured in dpi (dots per inch), typical capabilities are 200 dpi for a thermal transfer printer and 300 dpi for a laser printer. It is particularly critical in bar code printing. See also: Resolution.
Proof:Sent by a printer to a customer, the Proof is a communication of what will be printed. Electronic or Digital Proofs can be emailed, often in .pdf format, so a customer can digitally approve their artwork. Hard Proofs can also be mailed. Press Proofs are printed using the actual printing process that a job will be produced with.
Registration:The exact, corresponding placement of successively printed images and/or successively die cut pressure sensitive labels. Described as "Print to Print", or "Print to Die" registration.
Relative Humidity: The ratio of the amount of moisture in the air at any temperature to the amount required at that temperature to saturate the air.
Release Coat: The (silicone) coating on a liner that allows pressure sensitive labels to be easily removed or dispensed.
Release Liner: The component of the pressure sensitive label material which functions as a carrier for the pressure sensitive label. Usually silicone coated, it readily separates from the label when the label is removed for application.
Scan-ability: The quality of a material that allows for precise printing of bar codes, so as to ensure accurate reading or scanning of the bar code data. Readings (called percent decode ratings) are usually measured as a percentage indicating the number of successful scans out of a total of 100.
Scuff Resistance: Label surface resistance to something that rubs against it, including the label material itself, ink, or a protective coating.
Scuff Resistance: Label surface resistance to something that rubs against it, including the label material itself, ink, or a protective coating.
Service Temperature: The temperature a label adhesive would see during normal use by a manufacturer or consumer during storage, distribution, and end use.
Splice: A method of joining paper or plastic webs within a pressure sensitive roll to produce an operational continuous web. They can be placed into an incoming raw material roll by a supplier, or added in the rewind inspection process by a label converter.
Static Cling Label: A label that adheres to a substrate by static electricity -- no adhesive is necessary. Common use is as a window label applied to a retail glass door.
Substrate: The surface to which a pressure sensitive label is applied or adhered.
Tack: The property of a pressure sensitive label which causes it to adhere to a surface instantly with a minimum of pressure and contact time (as measured by TLMI Tester or equivalent equipment), also known as "initial tack".
Tamper-Evident Label: A pressure sensitive construction made with engineered features that indicate tampering, or where (attempted) removal of the label usually results in its destruction. This can be achieved with either material selection or die-cut slits.
Tear Strength / Tearing Strength: The force required to tear a label specimen under standardized conditions using an instrument designed to simulate the tearing encountered under general use conditions.
Tear Tab: An additional area of face material, next to the release liner of a pressure sensitive label produced in single form to facilitate removal of the release liner.
Tensile Strength: The force parallel to the plane of an applied label required to break a given width and length of paper under specified conditions.
Thermal Transfer Papers: Raw materials optimized to accept thermal transfer ribbons.
Thermal Transfer Printing: An imprinting method that uses heat and pressure to melt a wax-based ink onto a label.
TLMI / Tag and Label Manufacturers' Institute: A trade organization of the pressure sensitive label industry.
Top Coat / Top Coating: A substance coated onto a label material that will enhance the printing or the appearance of the finished label. For example, some films are top coated to ensure better ink anchorage to the surface of the material. See also: Clear Coat, Lacquer, Overcoat, Protective Coating, Varnish.
Transfer Tape: A coating of pressure sensitive adhesive applied to a liner that is release-coated on both sides. This allows a user to apply the tape to a surface and remove the liner, leaving only the adhesive on the surface.
U.L. / Underwriter’s Laboratories: An organization chartered with the testing and approval of specialty labels that threaten the safety of the general public.
Un-bleached: A term applied to pulp or paper which has not been treated with bleaching agents.
UV:Ultraviolet Light. In printing, UV Varnishes and UV inks are common – they are cured by exposing the printed web to a high-intensity UV Light.
Varnish - Pattern or Spot: A varnish that is applied with a printing plate. Often used to leave an un-varnished area so an expiration date or lot code can be imprinted.
Varnish: A heat-cured or UV light-cured coating applied to a face material for protection and/or decoration. Finish can be gloss, matte, satin or computer imprintable.
Vignette:A screen comprised of dots that is printed with either varying size or density. The resulting printed image appears to "fade away" or disappear on one end of the graphic. Also called Gradation or Gradient Screen.
Web Width: The measurement of the web that is perpendicular to the machine direction. Typically refers to the width of the liner or carrier.
Wrinkling: The puckering or creasing of a pliable material that can result from environmental conditions and/or manufacturing situations.
Yellowing: A defect characterized by a gradual color change in the original appearance of white paper; the development of yellowish or brownish hues.
Last Updated on Thursday, 02 April 2009 16:40