Glossary of Terms, G - M
NS = Refer relevant National Standard.
LM = Refer Labelstock Manufacturers specification sheets.
IM = Refer Ink Manufacturers specification sheets.
O = Other manufacturers specification sheets - Die or cutter,
plates, etc.
G
GAP
The space between two (2) objects.
GAPPING
Openings between layers within a roll of self wound laminating tape.
GAUGE
A unit of measure. Usually the thickness or diameter and generally expressed
by a number
Refer NS.
GAUGE BANDS
Areas where material or liner is thicker, forming a hard ridge as layer after
layer builds up in the same spot.
GEAR CHART
A handy reference compilation of the various printing lengths or repeats obtainable
within the different gearing systems of rotary presses
Referred to as teeth
per inch = TPI or teeth per centimetre = TPM.
GEAR MARKS
A defect in flexographic printing. Usually appears as uniformly spaced, lateral
variations in tone exactly corresponding to the distance between gear teeth.
GEAR SIDE - See DRIVING SIDE
GEAR STREAKS
In printing, parallel streaks appearing across the printed web at the same
interval as the gear teeth on a cylinder. Same as gear marks.
GEL
A state or condition in which an ink, varnish or coating has a jelly-like consistency.
GELLING
The thickening of an ink or other liquid, which cannot be reversed by stirring.
GHOSTING
Very faint reproduction of printed design without actual ink transfer. Shadows
or indistinct images appearing in solids or reverses typically caused by poor
ink distribution and/or poor ink formulation.
GLASSINE
A supercalendered, smooth, dense, transparent or translucent paper manufactured
primarily from chemical wood pulps which have been beaten to secure a high
degree of hydration of the stock. Commonly used as backing paper (liner)
Refer NS & LM Specification Sheet.
GLOSS
Characteristic of the surface which causes it to reflect light at a given angle
Refer NS & LM Specification Sheet.
GLUE - See ADHESIVE
GRAB - Also called TACK (Initial)
Ability of an adhesive to quickly adhere to a surface with a minimum of pressure
(usually touched to the surface with its own weight). Also called instant
adhesion or initial tack
Refer NS & LM Specification Sheet.
GRAIN
In paper making, the direction in which most fibres lie corresponding with
the alignment of the fibres in the direction of the paper travel through the
paper making machine.
GRAIN DIRECTION
In roll or fanfolded labels, the grain direction runs along the web, parallel
to the sides. The opposite of cross direction.
GRAM
Unit of weight in the metric system; the weight of one (1) cubic centimetre
of water at standard conditions. A litre of water weighs 1 kilogram, 28.35
grams = 1 ounce, 453.6 grams = 1 pound.
GRAVURE PRINTING
A printing process employing minute engraved wells (cells). Generally, deeply
etched wells carry more ink than a raised surface (letterpress and flexographic),
hence print darker values. Shallow wells print lighter values. A doctor blade
wipes excess ink from the cylindrical printing surface. Rotogravure employs
etched cylinders and web-fed stock.
GUARD BARS
The bars which are at both ends and center of a UPC and EAN symbol. They provide
reference points for scanning.
GUILLOTINE
An instrument for trimming sheets of paper (with a downward cutting action).
Guillotines are usually stand alone pieces of equipment, but on
some label presses, they are built into the main machine.
GUM - See ADHESIVE.
Referring to a broad class of synthetic and natural adhesive materials which
exhibit good tack characteristics
Refer NS & LM Specification Sheet.
H
HAIRLINE REGISTER
Register within +/- 1/2 row of dots in halftone printing.
HALFTONE
The reproduction of continuous-tone subjects such as photographs through a
contact halftone screen, which converts the image into dots with equal spacing
and different sizes.
HALO
An undesirable, peripheral outline of a printed image. An undesirable, peripheral
outline of adhesive around the edge of an applied pressure sensitive label
(due to adhesive ooze or substrate shrinkage).
HANG LABEL
A term used to describe a label where part of the liner is peeled away, the
exposed adhesive wrapped around an object, then stuck to the back of the liner
that remains. These products usually hang in the retail market
place. Airline suitcase baggage labels are an example.
HANG TAG
A term used to describe fold-over labels (stuck to themselves) generally used
for product identification. These products usually hang in the
retail market place.
HARD DOT
A term that refers to a dot where the fringe or halo is so slight as to be
barely noticeable and the dot is very sharp.
HARDNESS
Degree of hardness. Shore and Rockwell being two (2) scales used to measure
and compare hardness. Usually Shore is used to describe the hardness
factor of rubber rollers.
HAZE
A degree of cloudiness in a plastic material.
HDPE
-> 2 PLASTIC
HEAT RESISTANCE
The property of a material which inhibits the occurrence of physical or chemical
changes caused by exposure to high temperatures.
HEAT SEAL
To bond two (2) or more surfaces together using heat. Usually for sealing plastic
or acetate bags.
HEAT SEAL LABELS
Label paper that has a coating which melts under heat to form the bonding agent.
Commonly known to the carpet industry as Iron-on Labels.
HEAT SEALING
The process of bonding two (2) or more surfaces together by heating the adherent
surfaces so that the heat seal coating or film is melted, thereby affecting
an adhesion between those surfaces. Pressure is often added along with heat.
HEAT SEALING ADHESIVE
An adhesive film applied to a substrate to be later reactivated by the application
of heat.
HELIUM NEON LASER
The type of laser most commonly used in bar code scanners.
HICKEY
A piece of foreign matter in paper or similar defect. A burr or defect on the
printing plate or engraving. Spots or any imperfections in the printing due
to dirt on the press, dried or lumpy ink, paper dust particles, etc.
HIGH SPEED UNWIND
A device used to accelerate the unwinding of a roll of labels on a high speed
automatic label dispenser.
HIGH TEMPERATURE ADHESIVE
An adhesive that will enable a pressure sensitive label to adhere or stick
well when applied to a hot substrate. Its characteristic will be such as to
have a high degree of resistance to aging or deterioration at the elevated
temperatures
Refer NS & LM specification sheets.
HIGHLIGHT
The lightest or whitest parts in a photograph represented in a halftone reproduction
by the smallest dots, or the absence of all dots.
HOLDING POWER
The ability to withstand stress, as in holding rigid label materials on small
diameter cylindrical objects. Involves both adhesive and cohesive strength
and flexibility of the face material
Refer NS & LM specification sheets.
HOLOGRAM
The pattern on a photosensitive material or embossed into a polymeric film
structure resulting from an interference pattern created by a laser light
striking an object, then merging with a reference beam of the same light.
One of the best examples of a hologram is the use of images in the clear part
of Australian bank notes.
HOT MELT ADHESIVE
Thermoplastic materials with 100% solids that liquefy when heated and re-solidify
on cooling to form a bond with the face sheet. The adhesive was applied to
a pressure sensitive lamination which includes a release coated backing sheet
Refer relevant NS & LM specification sheets.
HOT STAMPING
A process that uses heat and pressure to transfer the image from a metal printing
plate to a substrate using a coloured or metallic foil to produce the desired
result. Most commonly used to create metallic effects on a printed label.
HUE
In colour, the main attribute of a colour which distinguishes it from other
colours. Red, orange, green, blue are colour hues.
HYDROSCOPIC
The quality of some materials to absorb atmospheric moisture; exhibiting an
infinity for water.
I
I
Roman numeral for 1.
ID
Inside Diameter.
IDLER ROLLERS
Roller mechanisms on converting machines used to support, smooth or direct
the web in its course of travel through a machine. Not driven.
IML
In-mould Label. A label which is not pressure sensitive, but is placed inside
a plastic mould before the plastic is blown, not extruded. The label has a
heat responsive adhesive, and when plastic is blown into the mould, it breaks
down momentarily, and the label becomes part of the article.
IMPREGNATE
To saturate or permeate a material with a substance.
IMPRESSION
The image transferred from the printing plate to the substrate or the adjustment
required to affect the same.
IMPRESSION CYLINDER
In printing, the cylinder on a printing press over which the material feeds
to the impression from the inked plate.
IMPRESSIONS
Imprints generally caused by defect on core or bad splice, etc. Can show up
for many meters on certain materials.
IMPRINTING
Technique in which changeable copy is added to blank or previously printed
labels, tags, etc., with a secondary printing device such as an imprinter,
computer printer, typewriter, etc.
INCH - See JOG
A unit of imperial measurement. 1" = 25.4mm. Often used to refer to computer
imprinting as 6 lines per inch, etc.
IN-LINE PRESS
A press coupled to another operation such as sheeting, die cutting, creasing,
etc. A multi-colour press in which the colour stations are mounted horizontally
in a line.
IN-MOULD LABELS - See IML
INDEX HOLES - See FEED SLOTS
INDEX PUNCH - See FEED SLOTS
INFEED NIP
A mechanism designed to control the forward travel of the web into the press.
INFRARED
Type of heaters used for drying.
INFRARED LIGHT
Refers to infrared rays, the longer wave lengths below the red in the spectrum.
Used as a source of heat. Note: Infrared rays are usually visible as light
from a infrared heater, but not when drying is used.
INHIBITOR
A compound (usually organic) that retards or stops a chemical reaction such
as corrosion, oxidation or polymerisation.
INITIAL RELEASE
A release test run immediately after coating and laminating of pressure sensitive
labelstock
Refer NS for test procedure & LM specification sheets.
INITIAL TACK
Degree of stickiness when a pressure sensitive label is first applied to the
product
Refer NS for test procedure & LM specification sheets.
INK BLEED
Penetration of one colour of ink into the facestock in such a manner as to
cause one colour to run or discolour either the background colour of the facestock,
or another colour of ink that is laid down adjacent to the colour that is
bleeding
Refer NS.
INK FOUNTAIN
Device which stores and supplies ink to the inking roller in a controlled manner
on a printing press.
INK HOLDOUT
Describes the degree to which pigment and binder stay on the surface of a material;
a function of the ink, material and solvent (or chemical) interactions.
INK PAN - See INK FOUNTAIN
INK PUMP
Electric or air driven mechanical pump that circulates an ink or coating from
a holding tank to the ink fountain.
INTERNAL BOND See COHESIVE STRENGTH
Refer NS & LM specification sheets.
INTERNAL STRESS
Stress created within the adhesive layer by the movement of the adherends at
different rates or by contraction or expansion of the adhesive layer
Refer
NS for test procedure & LM specification sheets.
ION DEPOSITION
Also known as NON-IMPACT PRINTING. A method of printing using a non-impact
electronic image process. Ink or dye is blown onto labels, or transferred
as an inkjet, or as a powder.
IR-SCANNABLE
Capable of being read by an infrared scanner.
IRRADIATION
Treated with ultra violet light or another high energy ray.
J
JIG
A device used to assist the correct placement of a semi-automatically applied
pressure sensitive label. Usually it is made to fit the shape of the product
being labelled.
JOG - INCHING
To intermittently operate a press for very short increments of web travel.
Presses are wired so as not to operate at speed while in inching
mode.
JOIN - See BREAK
JOURNALS
The end shafts on which a roller rotates, usually within the needle bearing
or bushing of a die block.
JUMBO ROLL
A full width roll of pressure sensitive laminate (converted or whole) where
the outside diameter is larger than standard
Refer NS & LM specification
sheets.
K
K
Common letter used in English for 1,000.
KEY-LINE
In artwork, an outline of finished art for labels to indicate the exact shape,
position, and size for such elements as half-tones, line sketches, text, etc.
KEY MARK OR TRIGGER
A code bit(s) that provides the scanner with the instruction that the code
is in a position to be read. Used in some fixed beam readers.
KICKOUT
The precipitation of the solid part of an ink or coating.
KISS CUT
A die-cutting operation which cuts through the face sheet to a liner, but not
through the liner in any way
Refer NS & O.
KISS IMPRESSION
The lightest possible impression which will transfer the film of ink from the
transfer roller to the plate and from the plate to the material being printed.
KNIFE CUT LABELS - See BUTT CUT LABELS
KNOCK-OUT
In colour printing, the process of dropping an image out of the colour such
as dropping white type out of a colour background. Often called reverse printing.
KROMEKOTE
A trademark of a clay coated paper with a highly polished, mirror-like finish;
high gloss.
KROY
A machine that uses foil and a disk with relief lettering to impact letters
of the alphabet in a uniform manner to help create artwork. A typesetting
machine.
L
L
Roman numeral for 50.
LABEL
A method by which to apply identification to an object. The functional portion
of a pressure sensitive construction comprising the face material and adhesive,
die cut into the shape desired
Refer NS. See front of Glossary for representative
illustration.
LABEL PANEL
Main panel of a container specifically created for the purpose of placing the
pressure sensitive label.
LABEL STOCK - LABELSTOCK
Pressure sensitive laminate from which labels are converted; usually refers
to roll stock
Refer NS & LM specification sheets.
LABELLING MACHINE
Dispensing apparatus that, by means of driving or pulling the backing (liner),
delivers a pressure sensitive label and applies it to a product.
LACQUER
A clear protective coating, usually glossy, applied to a printed web in-line
on a label press just prior to die-cutting.
LADDER - See MATRIX
LAMINANT
An adhesive for combining and bonding a combination of films, foils, plastics,
papers or other materials. Pressure sensitive constructions are often called
laminants.
LAMINATE
A web of material formed by bonding two or more materials together as in a
pressure sensitive construction. To apply one layer of material over another
Refer NS & LM specification sheets.
LAMINATION
A plastic film bonded by heat, adhesive, and/or pressure to a printed web for
protection or appearance. Two or more materials bonded together functioning
as one (1).
LAND - See TIE
LASER PAPER
Paper suitable to accept laser printing. Labelstock used to produce labels
in sheets (A4) for laser printers must be able to withstand heat and bending
around rollers within the laser printer
Refer LM specification sheets.
LASER PRINTING
A method of printing which utilises a laser beam to put images onto a substrate.
Usually the surface of the substrate must have specific characteristics to
accept laser printing. Common desk-top laser printers actually transfer the
image to a toner roller which then fuses the toner to the paper using heat
and/or a laser beam. Check manuals from machines to see if they are true lasers
before producing labels. Most machines have paper specifications in their
manuals, and also refer to Labelstock.
LASER SCANNER
An optical reading device using a low energy laser light beam as its source
of illumination.
LATEX
An emulsion of rubber or resin particles dispersed in an aqueous (water based)
medium. A natural or synthetic elastomeric dispersion in an aqueous system.
LATEX PAPER
Paper manufactured by two major processes; one of which is where latex is incorporated
with the fibres in the beater prior to formation of the sheet, and the second
of which is where a preformed web of absorbent fibre is saturated with properly
compounded latex. The papers are characterised by strength, folding endurance,
resistance to penetration by water, flexibility, durability and resistance
to abrasion
Refer Labelstock manufacturers specification sheet.
LATMA - FEDERAL. LATMA AUSTRALIA LTD
(The) Label & Tag Manufacturers Association of Australia Ltd. Membership
is made up of each member state with two (2) representatives from each state
(usually the President & one other elected person) attending meetings
etc. at least twice every year. LATMA Australia deals with issues such as
Training, National and International Standards, Imports, Bi-Annual Conferences,
Overseas Conferences and any other issue that members are likely to pursue.
The National President is elected from the committee and serves for two years.
LATMA Australia and the states are affiliated with PIAA in Australia, FINAT
in Europe and TLMI in United States of America. LATMA Australia Ltd Secretariat
resides in New South Wales at PIAA headquarters.
LATMA - STATE.
Each represented LATMA state has its own constitution and conducts both social
and working meetings through the vehicle of its committee. Usually two members
of the committee are elected to represent that states point of view
at the National Committee meetings. The President is elected by ballot. The
secretariat of each state LATMA usually resides in the PIAA Office in that
state.
LAY FLAT
A label material with good non-curling characteristics making it suitable for
automatic over-wrapping, insertion or any other form of further processing
requiring a flat sheet (Stay flat)
Refer NS & LM specification sheets.
LAY-UP - See ARTWORK
LAYOUT
The drawing or sketch of a proposed design. Usually precedes formal artwork.
LDPE
->4 PLASTIC
LEGGING
The stringing out of a pressure sensitive adhesive which frequently occurs
following die-cutting when the matrix or waste skeleton id being stripped.
LETRASET
The dry transfer of lettering (similar to a transfer) from a carrier sheet
by pressure. One letter or symbol at a time, usually performed by rubbing
the transfer through a protective sheet.
LETTERPRESS
Printing process which employs a relief or raised inked image which comes into
direct contact with the material being printed. Hard relief plates and oil
based or Ultra Violet inks are used
Refer NS.
LEUCO DYES
Used in the manufacture of some grades of IR, direct thermal papers.
LEXAN
General Electric Company (USA) trademark for polycarbonate film.
LIFTING
Defect where label exhibits some degree of lifting from the applied surface
Refer NS for test procedure.
LIGHT PEN
A hand-held scanning wand which is used as a contact bar code reader.
LIGHT RESISTANCE - See FADING
The ability of a plastic material to resist fading after exposure to sunlight,
ultra violet light or weathering. Nearly all plastics tend to darken under
these conditions. This also applies to inks and pressure sensitive labelstock
face material. Also called Light Fast when printing inks are referred to
Refer NS, IM & LM specification sheets.
LINE AND SCREEN
Any reproduction of line and single or multiple screenwork not utilising the
combination of the three primary colours. Any number of colours can be utilised.
LINE HOLE PUNCHING - See FEED SLOTS
LINE WIDTH REDUCTION
Degree of gain allowed for when making up bar code films.
LINER - See BACKING
LITHOGRAPHIC PAPER
A paper coated on at least one side, suitably prepared for lithographic printing.
LOGO
The abbreviation or trade jargon for logotype. Name, symbol or mark to identify
a company (trademark).
LOSS OF TACK
The adhesive loses its adhesion properties; does not grab the product as well
as it should
Refer NS for test procedure & LM specification sheets.
LUMINESCENT PIGMENTS
Special pigments available to produce striking effects in the dark. Basically
there are two types; one is activated by ultra violet radiation (usually black
light), producing very strong luminescence. The second is known as phosphorescent
pigments and does not require any separate source of radiation.
M
M
Roman numeral for 1,000. Printers measure; 1 em = 12 points; 6 ems =
1 inch.
MACHINE DIRECTION
The direction of any material parallel to its forward movement on (through)
the press.
MACHINE GLAZED
The finish produced in glaze on the wire side of a sheet as it is passed in
contact over a single, large diameter, steam-heated cylinder on the Yankee
Machine. The finish is commonly referred to as M.G.
MAGENTA
A subtractive primary colour which reflects blue and red light and absorbs
green light.
MAGNETIC CYLINDER
A cylinder used in die cutting that is magnetised to accept and hold in place,
flexible steel dies. Also used for metal backed printing plates.
MAGNETIC DIES
A thin, flexible, steel foil bearing the actual die cutting blades
that is held on to a base cylinder magnetically. Quite common in EDP label
production where identical repeats are frequently used.
MAKE AND HOLD
Material that has been manufactured and is being held for customer release.
MAKEREADY
The making ready to print or cut of any printing press. On printing
presses, all operations prior to running; such as mounting plates, adjusting
in-feed, edge guide, putting ink in the fountain, changing cylinders in flexo,
adjusting the impression, setting up the die cutting, colour matching, etc.
All preparatory operations preceding production on the press.
MAKING ORDER
Any order which cannot be filled from stock and is to be made according to
purchasers specifications; custom order.
MANDREL
A shaft upon which cylinders or other devices (numbering boxes, perforation
blades, etc.), are mounted or affixed. Also unwind and rewind shaft on to
which rolls of materials (or labels) are mounted.
MANILA
Describes the colour of paper/board manufactured from rope stocks. Usually
refers to Manilla board.
MARGINAL PUNCHING - See FEED SLOTS; PIN FEED
MASKING
Covering part of a surface to protect it from exposing, etching, etc.
MASTER ROLL
A full width roll that has finished the primary manufacturing process and is
usually untrimmed and unslit.
MATERIAL
Usually refers to un-converted stock, pressure sensitive or not.
MATERIAL SPLICE
An area where tape has been used to attach two rolls of material together to
form one continuous web.
MATRIX - Also known as WASTE SKELETON
The face material and adhesive surrounding a pressure sensitive label, usually
after die cutting.
MATT FINISH - MATTE FINISH
A low gloss or no gloss finish. A UV curable clear coat may be used to produce
a matte or textured finish.
MECHANICAL
Term for a camera ready past-up of artwork including type, photos, line art,
etc.; all on one piece of artboard.
MEMBRANE SWITCH
Self contained sealed film lamination printed with conductive inks that form
trace paths for electrical currents. Primarily composed of pressure sensitive
polycarbonate and/or polyester films designed to replace traditional glass-type
switches.
MEMORY
The property of a material that attempts to return to its original configuration
after being distorted. Can cause great difficulty if correct adhesives are
not used for glass or plastic small diameter phials.
METAL FOIL
Thin flexible layer of metal, such as aluminium, used as face materials. Thinner
gauges are often laminated to paper for strength.
METALLISED FOIL
A plastic or resinous film that has been coated one side with a very thin layer
of metal.
METALLISED PAPER
A label substrate consisting of a lacquered C1S paper on which a very thin
film of aluminium has been deposited.
METALLISING
Applying a thin coating of metal to a non-metallic surface. May be done by
chemical deposition or be exposing the surface to vaporised metal in a vacuum
chamber.
MEYER ROD
A method of coating utilising a wire wrapped stainless steel rod which meters
specific amounts of coating as it is applied to a substrate.
MEZZOTINT - See STOCHASTIC.
An irregular, random dot halftone.
MICR
Magnetic Ink Character Recognition. The process of machine reading characters
by means of magnetic sensing.
MICROMETER
A mechanical device for measuring thickness (usually in thousands of an inch).
MICRON
A unit of measure, One-millionth of a meter, or about .00004" (25 microns
= 0.001").
MIGRATION - See ADHESIVE STRIKE-THROUGH
The movement of one or more of the components of a pressure sensitive adhesive
to either the labelled surface or the label stock (face material). Also the
movement of one or more of the components of either the labelstock and the
labelled surface into the adhesive and/or ink
Refer NS & LM specification
sheets.
MIGRATION OF PLASTICISER
Loss of plasticiser from an elastomeric plastic compound with the subsequent
absorption by an adjacent medium of lower plasticiser concentration, often
causes a loss of adhesion.
MIL
Unit of thickness measurement used for thin materials. 1 mil = 0.001"
MILEAGE
The surface area covered by a given quantity of ink or coating. Coverage.
MILL ROLL
Roll of paper, film or foil as received by the converter from the mill.
MILLIPOISE
1/100th of a poise. The unit of viscosity measurement (for inks, etc.).
MINIMUM APPLICATION TEMPERATURE
The lowest temperature at which a pressure sensitive label can be applied to
a product and still retain initial tack
Refer Labelstock Manufacturers specification
sheets.
MISCIBLE
Capable of being mixed; mutually soluble.
MISREAD
A condition which occurs when the data output of a reader does not agree with
the encoded data presented.
MMSI
A million square inches of material.
MMSQ
Millions of square millimetres.
MODULE
The narrowest unit of measure in a bar code. A module may be black
or white. Contiguous modules are used to form bars or spaces which
are wider than one unit.
MOIRE
In colour process printing, an undesirable screen pattern formed by improper
screen angles of overprinting half tones. Often called a Moire Star or Pattern.
MOISTURE CONTENT
The moisture present in a material as determined by specified methods.
MOISTURE RESISTANCE
That property of a material which resists uptake or passage of moisture.
MOISTUREPROOF
That property of a material which makes it substantially impervious to water
vapour.
MOULD RELEASE AGENTS
Materials used in the manufacture of moulded objects to facilitate their removal
from the mould. ie. Oil. silicone etc. Mould release agents can cause serious
adhesion problems in some instances.
MONO WEB
A brand name for a printed pressure sensitive label web that is self wound.
A release coating is applied over the print so that the adhesive on the back
will not stick to the printed surface. The actual die cutting becomes a function
of the label application equipment. The process is covered by patent.
MONOMER
A primary chemical structure which reacts with itself, under the influence
of catalytic action to create polymeric forms of much greater molecular weight.
A component of Ultra Violet inks.
MOTTLE
A spotty or uneven appearance of printing mainly in solid areas.
MOUNTING
The process of affixing plates to/on a cylinder or base in proper position
to allow register, colour to colour to die.
MOUNTING AND PROOFING
Device for accurately positioning plates on the plate cylinder and for obtaining
proofs of those plates.
MOUNTING PLATE
Grid used to mount plates accurately.
MSDS
Material Safety Data Sheet. A written or printed text concerning a hazardous
chemical with all the pertinent information about the product as well as precaution
and protection information.
MSI
A thousand square inches of material.
MULTI-PROCESS - See COMBINATION PRESSES
A combination of any printing processes and other decorating methods. An application
of lacquer utilising another printing station other than the main printing
process shall not qualify as multi-process.
MVTR
A measure of the rate of water vapour transmission through any material.
MYLAR
DuPonts trademark for clear, tough
polymeric polyester film.
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