HowPack

Gamma Irradiation
Sterilization by means of exposure to a source of gamma rays, normally Cobalt 60.

Gas Transmission Rate
A measure of the permeability of a packaging film to gases by measuring the movement of a gas through the film under specified conditions.

Gasket
A liner applied between the sealing surface of container lip and closure to provide the ultimate seal.

Gaskets
Cork, cork and rubber, rubber, fiber, paper, plastic, silicone, sponge, and non-asbestos gaskets.

Gate
In a molding process, a restricted section of runner at the edge of an injection mold cavity, serving to permit entrance of the plastic material into the closed cavity and core assembly.

GCMI
Glass Container Manufacturers Institute. Former name of GPI.

Glass Coating, Safety
Stock and custom glass containers with special safety and shatterproof coatings.

Glass Types
Four types of glass are specified by the U.S. Pharmacopoeia on the basis of chemical durability tests. Types I, II, and III are intended for packaging parenteral preparations and Type NP for non-parenteral products. Type I: Containers normally made of borosilicate glass having a highly resistant composition. Type II: Containers made of commercial soda-lime glass which have been treated on the inside surface at a high temperature to obtain a great improvement in chemical resistance. Type III: Untreated glass containers made of commercial soda-lime glass of average or somewhat above average chemical resistance. Type NP: Untreated glass containers made of ordinary soda-lime glass.

Glass, Lead Crystal
Decorative glass items made from a lead crystal formulation are available.

Glassine 54#
The 54# Glassine liner is composed of: 25# Glassine / 4# butyl ì rubber adhesive / 25# Glassine. It is primarily used in child ì resistant closures. Glassine is the major Tacseal material currently available from ì Owens Brockway. It is used exclusively on dry products.

Glassine 57#
The 57# Glassine liner is composed of: 25# Glassine / 7# ì laminating wax / 25# Glassine. Glassine is the major Tacseal material currently available from ì Owens Brockway. It is used exclusively on dry products.

Glassware
Stock and custom glassware, including bowls, stemware, candle holders, vases, plates and perfume bottles.

Gloss
Shine or luster of the surface of a material. If a surface clearly and plainly reflects an image of light, it has a high gloss.

Gloves
Latex gloves.

GMP
Good manufacturing practices. Regulations promulgated by the FDA under which device manufacturers must produce, package, and label their devices.

Gold Lacquer
A protective coating which has a yellow color. May be of lacquer or baked enamel.

Gold Reverse
The gold-lacquered interior of a closure.

GPI
Glass Packaging Institute. A trade association for the glass container and closure industries, with recommended specifications published for glass containers, glass finishes, and metal and plastic closures.

GPPS
General Purpose Polystyrene (GPPS) is a clear polymer that exhibits high stiffness, good dimensional stability, low specific gravity and excellent electrical properties. It offers several advantages over other polymers because of its clarity and ease of processing, both of which are due to its amorphous nature.

Graduations
Marks on a container to show fluid levels of contents on a scale of full to empty.

Hanging Tabs
Hanging tabs for merchandise display, piggyback tags for attaching promotional items to other merchandise and product identification tags. Styles on some of the tabs include slot, Euro-style, round hole, hook, bottleneck and inventory.

Haze
The degree of cloudiness in a plastic material.

HDPE
High density polyethylene. The resin of choice in blow molding because it is stiff, chemical resistant, has good processing behavior and good environmental stress crack resistance (ESCR). This ESCR makes it a good choice for bleach and detergent bottles where resins having densities between 0.950 and 0.960 and above are commonly chosen. Injection blow molding is a proven and valued processing technique when a container benefits from excellent neck finish and lack of pinch-off.

Headspace
Space between the level of the contents of a container and the closure. Headspace is required to allow for expansion of a product due to heat or pressure, and to allow the container to be grasped without spilling the contents.

Healthcare Products
Disposable scalpels and razors, skin closure strips, cotton balls, surgical and prep blades, syringes, pill boxes, medicine spoons, bandages, home health care aids, valves for asthma inhalers, dosage cups, ampule breakers, blood sedimentation tubes, glass dropper units with rubber bulbs, urine collection containers, sterilizable packaging materials, cotton and plain tip applicators, and tongue depressors.

Heat Stability
The resistance of a plastic material to chemical deterioration during processing.

Heat Transfer
Process similar to hot stamping except preprinted images on a carrier web are applied by heat and pressure to the surface to be printed. Multicolor decoration is a one-step process. Method is widely used for decorating plastic bottles but also for glass and folding cartons.

Heat Transfer Label
Labels printed with special inks on a web from which they are transferred to containers by application of heat as they contact the container surface.

Heat-Seal
A method of uniting two or more surfaces by fusion, either of the coatings or of the base materials, under controlled conditions of temperature, pressure and time (dwell).

Heat-Seal Label
A label made of paper or other material coated on one side with a heat-seal coating, usually a thermoplastic resin, and characteristically difficult to remove after application.

Heavy Bottom
A bottom defect. A localized thick area in the bottom which is usually thickest in the center of the bottom.

Heavy Metals
A series of metallic elements within the periodic table of elements of relatively high atomic weights that, upon exposure, tend to collect in specific body organs and at high levels have been shown to be toxic. Historically, most ink pigments were derived from compounds containing heavy metals. Heavy metals include lead, arsenic, cadmium, mercury, selenium, barium, chromium and antimony.

Heel
The lower portion of a glass or plastic container, starting with the bearing surface of the bottom and including a small portion of the lower side-wall.

Heel Radius
The degree of curvature at the extreme bottom end of a bottle extending upward from the bearing surface. Also called base radius.

Heel Tap
A bottom defect. A localized thick area at one side of the bottom.

Helix Angle
The measure of inclination of the thread, from a plane perpendicular to the vertical centerline of the thread finish.

Hermetic Seal
A seal that will exclude air and will be leakproof at normal temperatures and atmospheric pressures.

Hilo
Also hi-lo. Double-wall corrugated board combining both A-flutes and B-flutes.

HIPS
High Impact Polystyrene (HIPS) is used in applications requiring more toughness than that provided by general purpose polystyrene. During the 1990’s, new grades of HIPS were developed with the stress crack resistance to replace ABS. It is produced from styrene monomer along with elastomers. The resulting opaque material offers good dimensional stability, low-temperature impact strength and rigidity. HIPS is readily molded to precise tolerances. It can be combined with other plastic parts to make units which are attractive and tough. Disadvantages include poor barrier properties, and poor grease resistance.

Hollow Neck
A neck defect. A neck in which the glass has blown away, leaving it with thin walls.

Homopolymer
A polymer, consisting of (neglecting the ends, branch junctions, and other minor irregularities) a single type of repeating unit. Also see “polymer”.

Horizontal Bar Code
A bar code or symbol presented in such a manner that its overall length dimension is parallel to the horizon. The bars are presented in an array which looks like a picket fence.

Hot Check
An edge or side defect. A check characterized by deep V-shaped cracks appearing on the edge or side.

Hot Filling
The product, usually a liquid, is passed through a heat exchanger and then filled at elevated temperatures. The closure is then applied. Any microbiological contamination on the inner surfaces of the container (usually a bottle) is destroyed by the hot liquid without heating the bottle itself, as in the technique of in-bottle pasteurization.

Hot Stamping
This decorating technique utilizes a die (design) that cuts metal foils from a ribbon and by heat, embosses the design onto the surface of the plastic containers. Often used in conjunction with silkscreening on cosmetic containers such as those used for shampoos and conditioners.

Hot-Melt Adhesive
Adhesive, solid at room temperature, which is liquefied by heat, applied molten, and forms a bond by cooling and solidifying. Based on thermoplastic polymers generally modified with resins and/or waxes. Usually used in range of 250 to 400 degrees F.

Housewares, Glass
Varieties include mugs, tumblers, trays, bowls, lamp parts, globes, vases, and salt and pepper shakers.

Housewares, Plastic
Varieties include drinkware, kitchenware, servingware, cleaning and bath accessories, measuring cups, cooking utensils, bowls, cookie cutters, spice shakers, candy jar containers, placemats, and food canisters.

HS 015
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 015 is a paper-backed aluminum foil coated with a clear ì heat-sealable blend of high molecular weight ethylene and vinyl ì acetate copolymers. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/E, glass, PET, PVC, P/S and P/P containers. ì Additional uses: dry products, spices, peroxide, glass cleaner, ì milk and fruit juice.

HS 030
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 030 is composed of aluminum foil laminated to glassine and the ì glassine coated with a clear heat-sealable blend of high ì molecular weight ethylene and vinyl acetate copolymers. Color: ì White. Suggested uses include tamper indicating innerseal for OTC drug ì products in P/E, glass, PET, PVC, P/S and P/P containers. ì Additional uses: dry products, spices, fruit juice, milk, glass ì cleaner and peroxide.

HS 035
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 035 is composed of a paper-backed aluminum foil coated with a ì clear heat-sealable blend of high molecular weight ethylene and ì vinyl acetate copolymers. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/E, glass, PET, PVC, P/S and P/P containers. ì Additional uses: dry products, spices, fruit juice, milk, glass ì cleaner and peroxide.

HS 053
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would affect ì the product or closure function and appearance. HS 053 is composed of a paper backed aluminum foil coated with a ì clear heat-sealable blend of high molecular weight ethylene and ì vinyl acetate copolymers on the paper side. Color: Yellowish ì White. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/E, glass, PET, PVC, P/S and P/P containers. ì Additional uses: dry products, spices, fruit juice, milk, glass ì cleaner and peroxide.

HS 057
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 057 is composed of an aluminum foil, polyester combination ì coated with P/E. Color: Foil. Overall thickness: .0038″. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/E containers. Additional uses: dry products, ì motor oil, anti-freeze, cooking oil, shampoo, fruit juice and ì vinegar.

HS 057A
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 057A is composed of an aluminum foil, polyester combination ì coated with P/E. Color: Foil. Overall thickness: .0030″. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/E containers. Additional uses: dry products, ì motor oil, anti-freeze, cooking oil, shampoo, fruit juice and ì vinegar.

HS 194
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 194 is composed of an aluminum foil, polyester and PVC ì combination. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products on PVC and PET containers. Additional uses: dry ì products, shampoo, mouth wash, fruit juice and cooking oil.

HS 205
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 205 is composed of a heat sealable aluminum foil and P/P ì combination. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products in P/P containers. Additional uses: dry products, ì cosmetics, spices, motor oil, anti-freeze, shampoo, cooking oil, ì fruit juice and vinegar.

HS 295
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 295 is composed of a heat sealable aluminum foil, polyester, ì and P/P combination. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/P containers. Additional uses: dry products, ì cosmetics, spices, motor oil, anti-freeze, milk, fruit juice, ì cooking oil, vinegar and shampoo.

HS 402
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 402 is composed of a heat sealable aluminum foil and surlyn ì combination. Color: Aluminum. Overall thickness: .003″. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/P containers. Additional uses: salad dressing, ì dry products, cooking oil and peanut butter.

HS 402A
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 402A is composed of a heat sealable aluminum foil and surlyn ì combination. Color: Aluminum. Overall thickness: .0035″. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/P, treated glass, PET, PVC and P/S containers. ì Additional uses: dry products, salad dressing, cooking oil and ì peanut butter.

HS 403
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 043 is composed of a heat sealable aluminum foil and surlyn ì combination. Color: Aluminum. Overall thickness: .0040″. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/P, treated glass, PET, PVC and P/S containers. ì Additional uses: dry products, salad dressing, cooking oil and ì peanut butter.

HS 592
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 592 is composed of an aluminum foil and polyester combination ì coated with a clear heat sealable blend of high molecular weight ì ethylene and vinyl acetate copolymers which can be waxed- or ì permanent-laminated to pulp or P/S foam. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/E, glass, PET, PVC, P/S and P/P containers. ì Additional uses: dry products, spices, fruit juice, milk, glass ì cleaner and peroxide.

HS 702
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and appearance. HS 702 is composed of a heat sealable aluminum foil and P/E ì combination. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/P containers. Addditional uses: dry products, ì motor oil, anti-freeze, cooking oil, fruit juice, vinegar and ì shampoo.

HS 805
A SANCAP Liner Technology product. SANCAP Heat Seal is a ì proprietary heat seal coating with a relatively low melting ì point. It works in many applications where high heat would ì affect the product or closure function and application. HS 805 is composed of aluminum foil with a co-extruded heat seal ì coating. Color: Aluminum. Suggested uses include tamper indicating innerseal for OTC drug ì products on P/E, glass, PET, PVC, P/S and P/P containers. ì Additional uses: dry products, spices, glass cleaner, peroxide, ì fruit juice and milk.

HVD
High viscosity density (HVD) pumps are available.

IBC
Intermediate bulk container. A large bag, box or other container capable of transporting, storing, and discharging one-half ton (1,000 lbs) or more of material.

IBC’s
Rigid and flexible intermediate bulk shipping containers (IBC’s) that come in plastic, steel and composite. Different sizes are available.

IBM
See injection blow molding.

ID
Inside diameter of a container or container part, ordinarily of the container shell or body.

Impact Resistance
Relative susceptibility of plastics to fracture by shock as indicated by the energy expended by a standard pendulum type impact machine. The ability to withstand mechanical abuse in service, as related to dropping and impacts.

Impact Strength
(1) The ability of a material to withstand shock loading. (2) The amount of energy needed to fracture, under shock loading, a specified test specimen in a specified manner.

Imperial Gallon
The British gallon, equal to 277.274 cubic inches, or about 4.8 U.S. quarts.

Induction Sealing
A sealing technique in which excitation by means of high frequency elctric impulse causes materials to bond. Usually associated with inner seals whether they are applied separately or as an integral part (metal or platic) of the closure.

Injection Blow Molding
A two-stage process of plastic bottle manufacturing where a preform or parison is injection molded. The bottle finish is formed at this time. The preform is then transferred to a blow mold where the bottle takes its final shape.

Injection Mold
A mold into which a plastic resin is introduced by pressure from an exterior heated cylinder.

Injection Molding
A molding process whereby a heat softened plastic resin is forced from a heating cylinder into a relatively cool cavity which gives the product a desired shape.

Ink Jet Printing
Non-impact method of printing whereby tiny drops of ink are formed into letter, number or other configuration and sprayed on to the object or surface to be printed. Can be used for high speed printing. A major application is for code marking beverage cans.

In-Mold Labeling
Process by which preprinted labels are placed in the mold before the plastic is injected into the mold. This form of labeling is very economical for large manufacturing runs, as it does not require any additional processes on the production line or post production decorating.

Inner Seal
An extra seal of comprising a sheet that is resistant to water vapor or vapor from some chemical, and adhered to the top end of a container below the regular cover or closure, to give added protection to the contents, such as: hygroscopic materials like soluble coffee, volatile chemicals such as chloroform, or creams and ointments containing volatile ingredients. The added protection includes: barrier to movement of water vapor or volatile chemicals and perfumes, and protection against tampering, contamination and leakage.

Interrupted Thread
Threads on the neck finish of bottles that are not continuous, having gaps at seam areas to avoid scratching internal coatings on closures.

Irradiation, Atomic
As applied to plastics, refers to bombardment with a variety of subatomic particles, generally alpha-, beta-, or gamma rays. Atomic irradiation has been used to initiate polymerization and copolymerization of plastics and in some cases to bring about changes in the physical properties of a plastic material.

Jars, Plastic
Stock and custom plastic jars in P/P, P/S, P/E, PVC, PET, PETG, SAN, HDPE and LDPE. Decorating options are available on most items.

Jeroboam
A champagne bottle holding the same amount contained in four ordinary champagne bottles (102-2/5 oz).

Jig
Tool or fixture that is used for holding a component that is to be worked on during the manufacturing, decorating and assembly processes.

Jug
A bottle, usually of half-gallon or larger capacity, fitted with a handle.

KD
Knocked down. Applied to boxes, cartons, cases, etc., which are stored or shipped flat, that is before the package is set up for loading.

KLP/SFW
Extruded 75 gauge saran film laminated directly to Kraft lined ì pulpboard with a wax coating on the saran. There is always a ì full wax coating on this liner.

Knurl
Indented or crimped portion on the skirt at the top of the cap for holding liner in cap, used as a grip for applying cap and also for a better hold or grip for removing. Also provides non-skid surface during threading operation.

Kraft
A chemical wood pulp made by the sulphate process, or paper or paperboard made from such pulp. It is brown in color and is the strongest pulp product made from wood.

Label Panel
That portion of the body of a container to which labels are affixed or decoration imprinted.

Labels
Self-sticking, bar code, UPC, IBM, mylar, cloth, color, aluminum, wrap-around, spot, cling, sleeve, pressure sensitive, heat transfer, DOT, in-mold, expanded content, holographic, rotating, inverted vertical hanging, medical, shipping, international wordless, paper, booklet, production, inventory, and shrink labels. Printing and decorating options are available.

Labels, Expanded-Content
Labels that expand for the printing of consumer directions for use. Available plain or printed, in a variety of colors. Hot stamping and embossing are also available.

Laboratory Services
Various services offered include analytical chemistry, toxicology/pharmacology, immunology, biocompatibility, non-destructive micro-analysis, pyrolysis, thermal analysis, thermogravimetric analysis, sterility assurance, environmental, biotechnical and industrial hygiene testing. Capable of analyzing textiles, biologicals, particles, metals, ceramics, minerals, polymers and semiconductors.

Laboratory Supplies
Vials, flasks, funnels, beakers, hot plates, tubes, tube racks, digital and fixed pipets, pipet and filter tips, stoppers, centrifuge ware, clamps, holders, siphons, trays, fume hoods, dispensers, microscope slides, culture dishes, syringes, incubators, water testing supplies, burets, spatulas, specimen cups, dropper assemblies, labels, ampules, and calibration equipment.

Land Dimension
The sealing surface of a glass or plastic bottle.

Land Seal
Also called flat land seal. The Land Seal requires that a flat surface molded into the closure makes contact against the top of the sealing surface (land) of a container. This seal works best when the closure contains a liner material. It is best suited for threaded closures.

Lap
A general defect. A large fold on the outside of the bottle. Also called “wrinkle”.

LDPE
Low density polyethylene. LDPE is similar to HDPE in composition. It is less rigid and generally less chemically resistant than HDPE, but more translucent. Used primarily for squeeze applications. LDPE is significantly more expensive than HDPE, but will yield a glossy bottle when produced in colors.

Lehr
A continuous-belt oven for the annealing of glass, and for fusing of ceramic color on to glass.

Lens Caps
Closures with clear inserts intended for cosmetic jars and round or square cosmetic pots.

Letter Check
An edge or side defect. A small check which appears in the lettering.

Lever Lock
A method of holding a lid on a full open head drum by means of a lever-operated tightening device or ring that can be locked in closed position.

LF
Lubricant Finish (LF). Lubricant finish treatment is used to ì reduce excessive removal torque build-up found with plain vinyl ì and P/E coated papers. These papers have a tendency to cold flow ì after the closure is applied, causing removal torque build up, ì which is is accentuated with time and temperature. The LF ì coating is effective in minimizing this problem. The LF coating is also used with Saran film, which has a tendency ì to grasp the glass sealing surface during capping. This results ì in erratic capping performance and false application values. ì Closures which appear to be on tight are reduced to approximately ì zero removal torque with only slight impact on handling. To ì overcome this tendency and insure good application and removal ì torque performance, the LF coating of wax treatment is used.

Light Bottom
A bottom defect. A localized thin area in the bottom of the container.

Light Resistance
The ability of a plastic item to resist fading when exposed to sunlight or ultraviolet light. Nearly all plastics tend to darken when exposed.

Light Seam
An edge of side defect. A defect characterized by thin spots in the side of the ware.

Liner
In the manufacture of closures, a disc of paper, cork, composition, etc., retained in a closure to provide a sealing surface against the finish of a container.

Liner Board
A type of paperboard used in making corrugated cartons.

Liner Fall Out
Liner falling out of cap; usually due to shrinkage, loss of moisture or under sized punching.

Linerless Closure
A one-component thermoplastic closure incorporating a sealing “fin” which, when applied to a container with the appropriate finish, seals most liquids including those that are volatile.

Liners
Trash can, drum, bin, hamper, pail, and disposable liners.

Liners, Closure
Stock and custom closure liners, including teflon-faced silicone, butyl, extruded and co-extruded, laminated, and vented liners. Sizes range from 8mm to over 120mm. Some of the liner material options include pressure sensitive, sure seal, 3M top tab, pulp/poly, foil, foil seal, and heat induction.

Lip
The extreme outer edge of the top of a container intended to facilitate pouring.

Lithography
Decorating of flat surfaces by means of plates. Lithography is the prime method for decorating cans, but must be done on the sheet steel before the can is formed.

LLDPE
Linear low density polyethylene.

Loading Marks
A general defect. Fine vertical laps on surfaces.

Locking Ring
Metal closing ring around the rim of a full-removable-head container intended to retain the cover and form a seal. The ring is a circular modified “V” or “U” section channel, the ends of which are drawn together by means of a bolt and the periphery thus shortened, to develop the closure.

Long Neck
A neck defect. A neck which has been stretched longer than that specified.

LTL
Less than truck load. An order which will not fill the minimum standard weight required for truck load freight rate, which usually means that the customer must pay an LTL freight rate.

Lug
(1) Extensions around the circumference of a lid which are crimped down to hold the lid securely in place against the body of the container. (2) A small indentation or raised portion on the surface of a plastic bottle, provided as a means of indexing the bottle for operations such as multi-pass decorating or labeling. (3) A metal fastener used for securing the top or bottom heads of a fibre drum, steel drum or metal pail to the side-wall.

Lug Closure
Interrupted thread finishes with the GPI finish number designations in the 2000 series.

Lug Cover
A cover for metal drum or pail, with extensions around the circumference that are bent down to hold the cover securely in place against the container body.

Lug Finish
Also called Lug/Twist. A glass container finish identified by intermittent horizontal tapering protruding ridges of glass that permit the specially shaped edges of the closure to slide between the protruding lugs and fasten securely with a partial turn. These lug finishes have the GPI designations in the 2000 series.

Lug/Twist
Intermittent thread design closure - commonly used for glass food containers.

LW
Light Wax (LW). Light wax treatment is generally used to improve ì the moisture vapor barrier characteristics of a given liner ì facing. The type of wax used for this treatment also acts as a ì lubricant in the same manner that LF coating of wax does.