8 Pt. Tag: A pressure sensitive face stock which has a semigloss finish and is 8 mils thick. It is used when stiffness of the label is important. Opacity is high because of its thickness.
The ability of a label surface or other material surface to resist rubbing,
scuffing or scratching.
The ability of a label paper or other material to retain liquids or vapors such
as printing inks, varnishes, humidity, etc.
The process which causes label paper or other material to absorb liquids or
The process used to determine the behavior of a label paper or other material
over a period of time, when subjected to unusually severe conditions.
Acetate: Transparent and matte cellulose films, used as a basis for
artwork and overlays.
Acid Free: a material with a neutral pH. The adhesive or product is neither
acidic or alkaline. This is an important property for labels that need
to last forever. Acidic materials tend to yellow with age.
Acrylic: A water-soluble polymer used in
paints to make them dry both tough and flexible.
(Peel) Adhesion: The amount of adhesion determined by measuring the force
required to remove or "peel" a label or adhesive coated material from
a test substrate at a specified angle, speed and condition. See Peel
The amount of adhesion determined by measuring the force required to remove or "peel" a label or adhesive coated
material from a silicone coated substrate under specific conditions.
The amount of adhesion determined by measuring the force required to remove or
"peel" a label or adhesive coated material from a substrate under
Adhesive: A coating used to bond label material to a substrate. Various adhesives are available to satisfy a wide range of applications.
(Acrylic) Adhesive: An adhesive composed of specific synthetic polymers or co-polymers, which are inherently pressure sensitive. This adhesive works well with plastics, metal, corrugated and wood.
When an adhesive has oozed or "pushed-out" beyond the label stock and
Adhesive Migration: This occurs when
the adhesive moves through what seems to be a solid object. Adhesive migration
could cause adhesive contamination for the contents of the labeled package.
(Hot Melt) Adhesive: An adhesive that when heated turns to a liquid and gains strength upon solidification and crystallization when cool. This adhesive is typically used when applying labels on in-line packaging and labeling machines.
(Microsphere) Adhesive: An ultra-removable adhesive that is powered by tiny spheres that are easily repositionable and remove without a trace. Microsphere adhesive has an excellent durability and life cycle. It is suitable for a wide range of applications.
An adhesive characterized by having high initial tack or adhesion to the
surface of a substrate. A label with permanent adhesive cannot be removed
intact or will require a substantial amount of force to be removed.
(Pressure Sensitive) Adhesive: An aggressive adhesive that with the application of light
pressure provides instant adhesion and does not require glue, water or heat to
adhere to the surface of a substrate.
An adhesive characterized by having low initial tack or adhesion to the surface
of a substrate. Removable adhesive allows the label to be removed from most
substrates without damaging the surface or leaving adhesive residue. A label
with removable adhesive will become permanent on a substrate over a period of
(Repositionable) Adhesive: An adhesive characterized by having low initial tack which
allows for easy removal and repositioning within a short period of time after
being applied. A label with repositionable adhesive will become permanent on a
substrate over a period of time.
The adhesive that remains on the surface of a substrate after a label is
(Rubber-based) Adhesive: An adhesive that is comprised of synthetic or natural
rubber and other compounds which creates a pressure sensitive adhesive.
(Solvent-based) Adhesive: An adhesive coating process that uses solvents in the
(Water-removable) Adhesive: An adhesive that can be cleanly removed from a substrate
when placed in contact with water.
Against the Grain:
Feeding label paper at a right angle or opposite to the grain direction of the
All temperature Adhesive: A common
designation for a pressure sensitive adhesive designed for application between
room temperature and freezing conditions. In spite of its name, it will not
apply successfully at all temperatures. Generally all temperature adhesives are
only used when application is done at a wide variety of temperatures because
they are more expensive than permanent adhesives. See also cold temperature
adhesive and freezer adhesive.
The securing or adhering of an adhesive, coating or ink to a substrate.
Animal Glue: Another name for
bone glue. It was the original type of strong gum in water re-moistenable adhesives. See also strong gum and bone glue.
The visible aspects such as color, finish and formation of a paper or
Application Temperature: A range in temperature that is required at the time of application.
Adhesives have a minimum application temperature and should be tested on the substrate under the application conditions.
Linear cuts through the liner of a pressure sensitive label material that
allows for strips to be removed individually.
A face stock or substrate that is manufactured to reflect all the visible
wavelengths in the spectrum equally.
Band Label: A label that
fully wraps around the surface to which it is applied. An example
would be sock band labels. Usually there is a slight overlap and the adhesive
sticks to itself.
A coating that prevents absorption or interaction between the substrate and any
The weight in pounds of a ream (500 sheets) of paper cut to a given standard or
basic size for that grade (e.g. 500 sheets 25 x 38 of 60 lb. coated book paper
weighs sixty pounds).
When a printed image goes beyond the trim edge of the label paper or substrate.
Migration of materials from an adhesive or substrate into a face material,
resulting in a mottled appearance of the face stock with possibly detrimental
effects to the adhesive.
A design that is stamped without metallic leaf or ink, giving a bas-relief
A bubbled appearance due to partial delamination between two or more surfaces.
Undesirable adhesion where the labels stick to the back side of the liner above
them. Usually due to
adhesive flow, incomplete die-cutting of the adhesive, improper drying of inks
or improper drying or curing of coatings. With gum paper the water
sensitive adhesive can stick to the face stock. Sometimes slamming down a
package can relieve it.
A term used to define the thickness or viscosity of ink.
The uniting of two items.
The percentage of light reflected from the surface of the face stock or
The process of printing with a sizing ink and the application of bronze powder
to produce a metallic look.
degree of thickness in a number of sheets of paper. Bulk and caliper are
related, but not numerical equivalents.
Butt Cut Label: A knife cut label in which the knife cut is made through the face stock, across the full width of the label. Most uses are for hand application of the labels.
C1S: An abbreviation
for coated one side. It usually refers to clay coated papers that are only
coated on the print side. Since adhesives cover the other side, many clay
coated papers we use are C1S. If product was C2S, it would be clay coated on
both sides. Typical uses for this type of product would be magazines and
Label paper or material that has gone through the process of calendering. The face stock or other material is passed
between rollers which increase the smoothness and gloss of its surface.
Calendering: A process of compressing and smoothing paper between heavy
metal rollers. Calendering makes the paper less
absorptive to ink by giving it a more dense and even
surface. Paper can be calendered to the following
finishes: High gloss, gloss or semi-gloss.
The measured thickness of a single sheet of label paper or material to the
closest ten-thousandths of an inch (which is equivalent to mils or points).
A paper or face stock with a very high gloss, enamel-like finish that has a
clay-based coating which is dried with heat and pressure against a highly
A process which gives paper an extremely glossy enamel-like finish. These are
created by bringing the paper in contact with chromium drums. Print surface is
exceptionally smooth. Cast coated papers have the highest gloss levels of any
clay coated paper. KromeKote is an example of a cast
Coated: A face stock or other material that has a coating (e.g.
clay, carbonates, latex) applied to the surface to improve its characteristics
(e.g. whiteness, opacity, smoothness, printability, gloss level).
Any face stock or other material that has a coating applied to the surface to
improve its characteristics. See Coated
A layer of minerals applied to the surface (one or both sides) of a paper or
other material to improve its characteristics (e.g. whiteness, opacity,
smoothness, printability, gloss level).
The rippling or wrinkling of a label paper or other material making the surface
uneven and unusable.
The internal strength of an adhesive, often determined by the force required to
divide it or separate it internally.
Cold Temperature Adhesive: A pressure
sensitive adhesive designed for application in refrigerator conditions to a
cold substrate. Most cold temperature adhesives will not work in true freezer
The high resistance to flow of a coated adhesive due to static stress at
Color Fastness: The
ability of a label paper or other material to maintain or hold color under
various situations such as storage, when exposed to light, heat or other
The ability of a label paper or other material to correspond in form or
character to the contours of a curved or rough surface.
The percentage of tonal gradation between the high, mid and low tones ranging
from black to white.
Lightweight grades of good quality and dimensionally stable label papers engineered
to feed automatically through copier machines.
Corona Treatment: An electrical
discharge which is used to raise the critical surface tension of substrates to
facilitate good wet-out of applied materials or coatings.
Crack ‘N Peel:
A diagonal scoreback liner developed by Avery/Fasson around 1957.
The direction across the grain. Paper is weaker and more sensitive to changes
in relative humidity in the cross direction than in the grain direction.
The curving or bending of a label paper or other material due to structural or
external conditions including humidity, heat and moisture absorption.
The point where a sheet of label paper or other material is cut from a roll.
Allowable variations in the sizes of cut labels. Straight-cut labels have tolerances of ± 1/32 inch (0.8
mm); die-cut labels have tolerances of ± 1/64 inch (0.4 mm).
Cut-to-cut tolerance: The allowable variation in size on labels between the edge of the label and the edge of the printed image on the label.
The separation of material into layers in a direction approximately parallel to
the surface. May be used to describe any splitting of a
material in a plane parallel to its surface.
The amount of light absorption or opacity of a label paper or other material.
Dextrin: Any of various
soluble polysaccharides obtained from starch by the application of heat or
acids and used mainly as adhesives and thickening agents. In conventional gum,
this is a type of adhesive that is primarily vegetable
Die: A device
used for cutting out a shape or stamping an image on label paper or other
Die-Cut: The line of severance between a pressure
sensitive label and its matrix or adjoining label made by the cutting edge of a
Die-Cut Label: A pressure sensitive label mounted on a
release liner from which the matrix has been removed.
A method utilizing a die or sharp steel rule to cut a specified shape out of
label paper or other material.
by plateless devices imaged by digital data driven
imaging systems. Digital printing runs from computer to press (or printer) to
output. Also called non-impact printing.
The ability of label paper or other material to resist dimensional change
resulting from change in moisture content or relative humidity.
Direct Thermal: A type of non-impact
printing that uses heat to darken printed images. There is a thermal coating
that darkens with application of heat. Advantages of this printing method are
high resolution, quiet printing and inexpensive printers. The main disadvantage
is that the images are not permanent. They tend to fade with time and can
darken when contacted with certain liquids. Direct thermal paper is more
expensive than other types of white paper.
Draw-Down: A method used by ink manufacturers and suppliers to
determine the characteristics of a specific ink on a specific label paper or
water sensitive adhesive that has a dull finish. It is more dimensionally
stable than conventional gum. See also water sensitive. Generally it is paper stock coated on one side
with an adhesive that is moisture activated.
Laminated Foil: This
is a pressure sensitive face stock that is paper laminated foil with a matte
appearance. It is available in both silver and gold colors. See also paper
Dyne Level: Dyne is a measurement of surface tension or energy. The level is the actual reading of the critical surface tension. Low dyne levels indicate a low surface energy which can contribute to poor ink adhesion.
The lifting or separating of the edge of a label from the application
The means of producing images using plateless,
The process used to decorate a label paper or other material by impressing a
surface with dies to produce a raised or depressed image.
A term used to describe the finish on a coated label paper or other material as
well as the coating used on the label paper or other material.
A face stock grade with a smoother, more uniform surface than standard machine
Engraving: An intaglio printing process which creates a raised image on the surface of the label paper or other material.
The primary surface material that forms the actual label of label paper. This
surface includes paper or tag stock, foil, film, fabric or cloth.
Linear cuts or slits through the face stock.
Paper: Papers primarily
intended for printing and writing applications. It is the opposite of coarse
paper in smoothness of printing paper. Sometimes, merchants that specialize in
printings grades are called fine paper merchants. See also coarse paper.
A term used to describe the surface of label paper or other material.
Operations preformed after printing (post-press)
which include trimming/cutting, die-cutting, gold stamping, folding, etc.
The ability of a face stock or other material to conform to a curved surface.
A printing process that prints from a relief image using a rubber or plastic
plate and fluid inks.
An ink with low viscosity (Also referred to as liquid ink).
paper coated with a pigment which not only reflects a visible wavelength, but
is activated by most of the remaining absorbed light to re-emit it as a color
of longer wavelength which results in reinforcement of the reflected color.
They almost seem to glow.
A dual component structure composed of extremely thin caliper metal (most
common is 0.009mm) laminated to paper for added strength when used as labels,
Format: The size, style, layout, margin, etc. of a label.
The measure of light reflected from the surface of a label paper or other
A type of preprinted label that is glued to the application substrate. Typically used on products in the beverage, cosmetic, food,
household, industrial and pharmaceutical industries.
The direction in which the fibers of the paper lie directly corresponding to
the direction in which the paper travels through the paper machine.
When the grain direction of the label paper or other material runs parallel to
the longest dimension of a sheet.
When the grain direction of the label paper or other material runs parallel to
the shortest dimension of a sheet.
Grammage: The metric term used for the basis weight of paper. It is
the weight in grams of a square meter of the paper (g/m2).
A printing process which employs a cylinder with tiny ink reservoirs etched on
its surface. The recessed areas are like wells that form the image as paper
fingers in a sheet-fed printing press that hold and guide the label paper or
other material as it passes through.
The leading edge of the label paper or other material that leads through the
Gummed Paper: See Dry Gum
The characteristic of a label paper or other material which inhibits change
(e.g. physical, chemical) when exposed to extreme temperatures.
Labels characterized by an adhesive that activates when heated on a labeling
High (Hollow) Die:
This is a device used to cut specified shapes out of label paper or other
material where the die is open allowing the die-cut material to stack up within
the die itself.
A term used to describe the finish of a face stock or other material
characterized by the reflectance of white light or gloss of the surface. See Cast Coated
See Ink Holdout
Humidity: The amount of moisture or dampness in the air.
A term used to describe the transference through a printing process of an image
to label paper or other material.
A term used to describe the amount of ink absorption on a label paper or other
material. The higher the ink holdout the higher the print
Labels designed to run smoothly on ink-jet printers.
A method of printing in which the image is engraved or etched below the surface
as in gravure.
Integrity: A term used to describe the quality of the paper surface (finish).
Job Lot: Rejected material. It could have been rejected by the manufacturer or by a customer. There is usually some type of quality defect in job lot material. It is sold at a reduced price because of the defect.
Jog: A procedure used to align the edges of a stack of label paper or other material by shaking or vibrating it on a machine or by hand.
polypropylene Kimberly-Clark face stock. It offers consistent printing
compared to vinyl because it does not need to be top coated for printing. It is
guaranteed for one year of outside exposure and may last longer without
degradation. We stock the FPG 80 grade which has a caliper of
A method of cutting through the face stock of label paper or other material,
but not through the liner.
Kraft: A paper or board containing unbleached wood pulp (brown in color) made by the sulfate process.
Pressure sensitive labels that share a common cut line and have no space
Pressure sensitive labels that are kiss-cut and formatted to include space
between each label. There are square corners, rounded corners, and special
Labels manufactured in a continuous format that are folded in a zig-zag configuration.
A label laminate consists of face stock, adhesive and silicone-coated backing
Any paper stock that has an adhesive applied to it.
A clear protective coating applied to the surface of a printed label paper or
type of computer printing that uses a dry toner which is fused to paper by a
combination of heat and pressure. Laser printers offer high print resolution,
quiet operation and some have high speed output. The heat and pressure that
occurs during printing can pose problems for adhesive coated labels. Special
pressure sensitive adhesives are selected for compatibility with the harsh
Labels specifically engineered to run smoothly through laser printers.
A printing process that uses a narrow band width, intense light beam to produce
an image from digital data through electronic impulses.
Latex Impregnated Paper: Paper
manufactured in a way to impregnate or saturate the paper fibers with latex.
One method of manufacture called impregnation combines the latex with the
fibers in the beater prior to formation of the sheet. The second method
saturates the preformed web with a properly compounded
latex. The latter is referred to as latex saturated paper. These grades are
characterized by strength, folding endurance, resistance to penetration by
water, flexibility, durability and resistance to abrasion.
A characteristic of label material with good non-curling and low distortion
When two or more materials are layered to form a unique product.
A protective film that is bonded to a printed sheet by heat and/or pressure.
Labels engineered to run smoothly through laser printers.
The original method of printing with type, that
transfers an image directly to the label paper or other material. It is a printing
process that uses raised type. Generally the smoothness of paper used is very
important to quality printing. Uniformity of caliper is also important. Rotary
letter press printing is higher quality than can usually be achieved by
An offset letterpress printing process which transfers a relief image to a
blanket and then to the label paper or other material.
A release coated base stock (frequently silicone-based) applied to the adhesive
side of pressure sensitive label material, protecting the adhesive from
contamination prior to application.
A printing process in which the image to be printed is rendered on a flat
surface, as on sheet zinc or aluminum, and treated to retain ink while the
non-image areas are treated to repel ink.
The grain direction of label paper or other material that runs parallel to the
longest dimension of a sheet.
Look-Through: The structural appearance of the sheet of paper when viewed by transmitted light. See Opacity
The weight of 1,000 sheets, in pounds, of a basic sheet size.
The direction the paper travels through the paper machine which is also the
direction of the grain in label paper and other material.
A term to describe the surface of a coated label paper or other material that
is characteristically dull and without gloss, for low glare appearance.
Metalized Film: A plastic or
resinous film that has been coated on one side with a very thin layer of metal. See metalizing.
Paper: A paper that has
been coated on one side with a very thin layer of metal.
application of a thin coating of metal to a non metallic
surface. They are similar in appearance to foil, but do not have a solid layer
(Also known as bleed) The movement of one or more
components of the pressure sensitive adhesive into either a substrate or face
The percentage of moisture in a label paper or other material in relation to
its total weight.
Mottle: A term used to describe label paper or other material that has a spotty or blotched appearance.
Non-Impact Printing: See Digital Printing
The remaining, usable label paper or other material left when sheets or rolls
are cut to the required size.
An unintentional transfer of wet ink from a printed sheet to another surface in
contact with it.
An offset printing process involving the transfer between various plates
(gravure plate, plate cylinder and rubber plate).
Opacity: The quality or property of label paper or other material of
being opaque, that reduces the amount of "show-through" or light that
Label paper or other material that is impenetrable by light and is neither transparent or translucent.
Ink used to completely block out an image or other information and that
reflects only its color.
A textured appearance of a label after being overlaminated.
Printing that is done over a previously printed area.
Over-Run: Extra or additional pieces printed in excess of the quantity ordered.
A material made of cellulose pulp, derived mainly from wood, rags and certain
grasses, processed into flexible sheets or rolls by deposit from an aqueous
The classification of paper based on the end use, the pulp used and the
treatment of the paper.
A mixture of celluose material, such as wood, paper
and rags, ground up and moistened to make paper.
Historically, a sheet made from skins of goats and other animals. Today, parchments
are simulated by treating the base stock with various chemicals.
A sheet that is larger than the cut stock of the same paper.
Pattern Gummed Adhesive: An adhesive coating that alternates strips of adhesive/no
adhesive parallel to the machine direction. The areas of no adhesive are
frequently used as "lift-tabs" for order picking type labels.
Selectively applying alternating strips of release coating/no release coating
in a machine direction pattern that results in a permanent face stock/release
liner bond in the non-release areas.
force required to remove a label. Also see Adhesion
A method of printing by an engraving process.
The lifting of the paper surface during printing which occurs when the
splitting force (tack) of the ink is greater than the surface strength of the
Continuous labels engineered to run smoothly on dot matrix printers.
The use of accurately positioned holes and special pins or pin bars on copy,
film, plates, presses and labels to insure proper registration of the image or
An ink additive that adds flexibility, softness and adhesion.
Pli-A-Print: A latex-impregnated, flexible stock manufactured by Avery
Graphics, suitable for exposure to moisture.
A strong film having good resistance to moisture, solvents, oils and many other
Any paper that is considered better than #1 by its manufacturer.
A lithographic press used for press proofing.
(In-Line) Press: A
printing press with the printing units in-line.
A printing press which can print both sides of the paper in one pass through
A printing press which prints on sheets of paper.
A flexographic press with printing units in stacks.
Any material or substrate that with the application of pressure, by hand or
machine, provides instant adhesion to another substrate and does not require
glue, water or heat.
Pressure Sensitive Paper: Any label paper or similar material with an adhesive
coating, protected by a backing sheet (liner) that when the liner is removed,
will adhere instantly to most substrates with the application of pressure, by
hand or machine.
Pressure Sensitive Label: A self adhesive label construction composed of face stock,
pressure sensitive adhesive and release liner. The official TLMI definition is A pressure sensitive self adhesive
label product is a die-cut part that has been converted through roll fed
production equipment utilizing the type of pressure sensitive self adhesive material which has a protective backing. The
end product is produced in the form of either rolls,
sheets, fanfold, or by other techniques that produce like products which have
been slit or cut from the converted rolls. Sheet PS product is also made into
labels that would be considered pressure sensitive labels.
Pressure Sensitive Label Stock: The combination
of face stock, pressure sensitive adhesive and release liner from which
pressure sensitive labels are manufactured.
A letterpress cylinder press on which the plate is mounted on a vertical plate
and paper is fed over a cylinder.
A press which prints on rolls of paper.
applied to the face material on the side opposite to the printing surface to
improve anchorage of the adhesive and prevent migration of adhesive components
into the face material.
The properties of the paper that affect its appearance and the quality of
A broad paper characteristic which refers to a paper's suitability for
Process Printing: Printing from a series of two or more halftone plates to produce intermediate colors and shades. In 4-color process the colors are yellow, magenta, cyan and black.
Varnishes, solvents, oily or greasy compounds used to reduce the body and/or
viscosity of inks for printing.
Register: The exact
corresponding placement of successively printed images and/or successively
Material coated on the liner which allows pressure sensitive labels to release.
The component of the pressure sensitive laminate which functions as the carrier
for the label. It protects the adhesive prior to application, and it readily
separates from the label immediately before the label is applied to the
substrate. Also called backing sheet or liner.
Printing from raised surfaces.
Removability: A relative term
applied to pressure sensitive adhesives to describe the force under which the
adhesive can be separated from the substrate. A removable label would be one in
which no damage or staining occurs to the substrate or the face stock on
separation from substrate. This action is relative to substrate and application
conditions. Few removable adhesives are removable from all surfaces.
Residue: Adhesive left on a substrate when a
label is removed.
Means of quantifying output quality of electronic devices using the number of
dots or spots per inch.
Paper of which the fibrous composition contains a majority of recovered or
recycled cellulose fibers (RCF).
An ink that has dried so it does not smear with normal handling.
Runnability: The ability of a label paper or other material to run on press without problems.
Satin Finish: A smooth, delicately embossed
finished paper with sheen. Also called Silk.
SC (Supercalendered) Paper: Paper that has undergone a mechanical treatment which aims
to obtain a very homogeneous surface. Normally made from
mechanical/ground wood pulps.
To impress or indent a mark with a rule in the label paper, liner or other
material to make folding easier.
Scoreback Liner: Crush scoring on the liner of pressure sensitive for
To impress label paper or other material with a rule for the purpose of making
A printing process in which ink is spread across an open-mesh fabric screen
held in a frame where a squeegee is used to form the image. A stencil placed
over the screen blocks ink from passing to the non-image areas.
Used essentially for labeling purposes, the grade has a self-adhesive coating
on one side and a good surface for printing on the other. The adhesive is protected
by a laminate which enables the sheet to be fed through the printing machine,
the laminate subsequently being stripped when the label is applied.
The temperature range that a pressure sensitive label will withstand after a 24
hour period on the substrate.
The range is expressed in degrees of Fahrenheit or Celsius.
The undesirable condition in which the printing on the reverse side of a sheet
can be seen through the sheet under normal lighting conditions.
See Satin Finish
Rotary knife used to slit a paper web into specified width or to trim the outer
A term to describe the process of cutting printed sheets by the cutting wheels
of a printing press.
Texture of the surface of label paper or other material, also called its
The resistance of a printed surface to smearing.
The resistance of a pressure sensitive label to the action of specific organic
Specialty Papers and Boards: This is a paper trade definition applied to such grades as
off-machine coated, laminated, impregnated, etc. as distinguished from
printings and writings etc. and other grades which do not require further
processing. Specialty papers and boards are often the raw materials for use by
other industries. The electrical and instrumental industries are examples.
Split Back: Cuts through the
release liner for the purpose of removal of the liner. These cuts are all the
way through the liner rather than compressed scores which only weaken the
liner, but do not break it.
The quality of paper to maintain its original size when it undergoes pressure
and moisture changes.
A process of cutting many sheets from the same parent sheet in which the
smaller sheets have different grain direction. Also called dutch or bastard cutting.
Electricity generated by friction as paper comes into contact with other paper,
metal, wood, etc.
Static Cling Material:
Specialty materials without adhesive that adhere or "cling" to
substrates through electricity generated by friction (static).
Rigidity, resistance to bending and inflexibility.
Label Paper or other material to be printed.
Cutting stacks of labels on a guillotine or flat cutter.
Strong Gum: A type of
conventional gum designed for good adhesion to corrugated.
It was originally an animal glue, but now has chemical
additives to promote adhesion. It is slightly more expensive than dextrin
adhesives, but less expensive than dry gum adhesives. See also conventional
gum, dextrin, animal glue, bone glue and dry gum.
The surface to which a label is applied. Converters also sometimes refer to the
face stock being printed as the "substrate".
Supercalender: Machine for giving paper a very smooth surface by passing
it through a series of alternate metal and composition rolls, revolving at
high-speed with pressure.
A measure of how well an adhesive wets out over the surface of the material
which it is applied. Materials
with Low Surface Energy (LSE) do not allow adhesives to wet out, while
materials with High Surface Energy (HSE) provide excellent wet out, thus
providing better adhesion. Rubber based adhesives usually provide better
adhesion to LSE surfaces. There are also modified acrylic adhesives that have
Paper having undergone a coating process in order to improve the
characteristics of its surface.
Synthetic Papers: Any petroleum-based waterproof papers with high tensile strength.
Tack (Label Paper):
The property of a pressure sensitive label which causes it to adhere to a
surface instantly with minimum pressure and contact time.
The degree of pulling power (stickiness) in printing ink.
Tag: A dense,
strong paper stock.
Labels on heavy paper or tag stock.
Mechanical curl that develops at the back edge of label sheets due to heavy
solids close to the back edge of the sheet.
A 7 mil white, porous polyolefin film providing excellent printability and
durability, and is suitable, when combined with the proper adhesive and liner,
for most digital print techniques.
The ability of a sheet to withstand tension. Paper possesses greater tensile
strength in its grain direction.
A printing process whereby slow drying ink is applied to paper and, while the
ink is still wet, is lightly dusted with a resinous powder. The paper then
passes through a heat chamber where the powder melts and fuses with the ink to
produce a raised surface.
An aspect of the structure of a sheet of label paper or other material seen by
A characteristic of paper, a slightly rough finish, which permits it to take
Top Coating: A coating done
on top of a face stock to improve ink receptivity, or to make the label more
durable. Nitrocellulose is used as a top coating for offset printing. Acrylic
top coated material will not offset print well. On the other hand, acrylic top
coatings are compatible with both water based and solvent flexo
inks. Top coating on direct thermal protects the label from liquids that could
darken the image. Some films are also top coated to enhance printing characteristics.
Ability to transmit light without being transparent.
Inks that do not block out the colored inks that they print over, but instead
blend with them to create intermediate colors.
Paper treated mechanically in the paper machine in order to improve the
smoothness and uniformity of the two sides; the paper is rubbed, smoothed and calendered.
Tyvek: An extremely high tear strength material made from synthetic spun-bonded polyolefin fibers.
Up: A term
used to describe the number of images printed on a large size sheet to take
advantage of full press capacity; two-up, four up, etc.
UV Coating: A very slick, glossy coating applied to the printed paper surface and dried on press with ultraviolet (UV) light.
Ink specially formulated to dry quickly with ultraviolet (UV) light while still
Papers that are not smoothed by going through the calendering
Under-Run: The final number of pieces printed that is less that the quantity ordered.
A thin, clear coating of mixtures of natural or synthetic resins and drying oil
applied to a printed sheet for protection or appearance.
Process consisting of applying varnish or lacquer on a material or a composite.
As with the application of a film, varnishing aims to protect the printing and
to increase the paper's glossiness, as well as improve its barrier properties.
Vellum Finish: A full, toothy
finish which is relatively absorbent for fast ink penetration. Text papers in
books frequently have a vellum finish. Vellum would not be as smooth as a
smooth offset or English Finish grade.
Viscosity: The resistance to flow.
A printing plate using silicone coating in non-printing areas so it can be run
without dampening solution on the press.
A printing process that uses waterless plates which eliminate the need for an
Water Sensitive: A water moistenable adhesive that activates when water is applied. There are two
major types of water sensitive adhesives -- dry gum and conventional gum.
Generally water sensitive adhesives only stick to paper and paper products.
Some will adhere well to glass. See also dry gum and conventional gum.
The capability of a label or other material to withstand the effects of outdoor
conditions such as sunlight, heat, cold, humidity, rain, snow and time.
Web: The roll
of paper that is used in web or rotary printing.
The paper is perceived to be white due to high clarity, elevated diffusion and
minimum perception of hues.
With the Grain: Feeding paper into a press parallel to the grain of the paper. Also called short-grain.
Xerographic Paper: Papers made to reproduce in copy
machines and laser printers.
Xerography: The printing process used by photocopying machines. Electric charges create the image on an electrophotographic surface that works as a plate. This surface is cleared after each copy is made, and used over again for the next copy.