Dead fold
A hand-
or machine-made fold which will remain in position without sealing, such as
is achievable on a stiff paper or soft foil.
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Decalcomania
The
process of transferring a printed design from specially prepared paper to
another surface and permanently affixing it thereto using heat and/or
solvents.
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Deceptive package
A
container which is designed to contain less product or different product than
its appearance would indicate. Such packaging is against the law in most
countries.
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Deep drawing
(1) In thermoforming of plastics, the
stretching of a formable web into a mould to the near limit of its
elasticity.
(2) In metal, forcing a piece or sheet of metal
in a die press operation.
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Deflashing
Covers
the range of finishing techniques used to remove the flash (excess, unwanted
material) on a plastic molding.
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Dehumidify
To dry
out or absorb moisture by means of heating, ventilating or the use of a
desiccant.
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Delamination
Separation
of layers of a composite material arising from lack of adhesive, poor
manufacturing technique or mechanical damage.
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Density
Weight
per unit volume of a material expressed in kg/m3 (g/cm3).
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Deposit
An amount
of money added to the price of a product to encourage return of the used
package, refunded upon return of the package after use.
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Desiccant
A
dehydrating agent. A material which will absorb moisture by physical or
chemical means. See also: Silica gel.
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Design
(1) Graphic. The surface decoration and wording
printed on a package to inform, instruct and attract the customer.
(2) Structural. The conception of the physical
construction of the package, to produce the most effective and economical
result.
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Destaticization
Treatment
of plastic materials which minimizes the effects of surface static
electricity. Can be accomplished
either by spraying the surface with specific materials, or incorporating
materials into the moulding compound. Destaticization prevents dust and dirt
from being attracted to and/or clinging to the plastic surface.
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Dew point
The
temperature at which air becomes saturated with vapour causing the vapour to
be deposited onto surfaces as a liquid (condensation).
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Dextrines
Water-soluble
adhesives based upon vegetable starch, with good wet tack but slow setting.
Not suitable for humid conditions.
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Die
(1) A form, usually of hard metal or plywood
with inserted cutting and creasing rules and knives, for cutting, creasing or
stamping out parts or blanks in paperboard or plastics.
(2) A metal part used to form molten plastics,
metals or glass into sheet, rods or other shapes.
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Die-cut
A method
of converting packaging materials in which a paperboard or plastic box or
carton blank has been cut, slotted or scored by a custom-made die.
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Dimensional stability
The
degree to which paper maintains its linear dimensions with changes in its
moisture content or applied stresses.
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Dip-coat
A coating
applied by dipping a porous packaging material into hot wax, asphalt, or
other sealant to seal it against transmission of water vapour or gas.
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Direct-to-press (DTP)
Design
can be transferred directly from the designer’s work station to the printing
heads of a digital printing system.
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Disc Top
Injected
molded two piece dispensing closure. Its one hand, one finger action closure
is useful for personal care and sun care products. Contrasting colours can be
used for the closure body and disc. Also called Press Top.
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Dispenser
A device which permits distribution or serving of a product in a
convenient form or quantity. The device can be incorporated into the package,
e.g. aerosol valves, atomizers, pouring spouts, sprinklers and metering and
dosing mechanisms.
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Display package
A package
designed and decorated to give high visibility when displayed.
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Disposable package
A package
specifically designed for a single use and not to be refilled.
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Distortion print
Distorted
printing of a design on flat metal or plastic surfaces that are subsequently
deformed or stretched, so that it appears correct after deformation has taken
place.
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Distribution packaging
Refers to
integrated package and product handling from factory to point of sale.
Although consumer or shelf packaging is part of the product distribution
cycle, it is usually understood that distribution packaging means the outer
and/or intermediate container which is required for efficient transportation
and storage.
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Divider
Any
package component that separates the space within the pack into two or more
cells, compartments, or layers. Dividers are made from various materials and
may be plain, interlocking, scored, horizontal, vertical, or diagonal. The
purpose of dividers is to separate articles and/or to provide cushioning.
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Doctor blade (roll)
A
stationary blade which regulates the amount of ink or coating to be applied
to a web of material or surface by scraping off the excess. A doctor roll is
a roller mechanism revolving in the opposite direction to the flow of the web
which provides a wiping action which controls the thickness and thus amount
of coating applied.
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Dome
A closure
of which the whole top surface is domed, starting at the shoulder. Doming can
streamline package appearance and increase the apparent pack height.
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Dots per inch (dpi)
The
number of print dots per linear inch of measure; used to describe the
fineness of halftones, tinted materials and electronic display terminals;
also termed "lines per inch.
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Double faced
Corrugated
board consisting of one layer of corrugated medium and a liner facing on both
sides of it.
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Double seam
A joint
attaching the top or bottom end of a metal can to its body, formed by
interlocking the edges of the end and the flanged body, double folding and
rolling firmly together.
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Double wall
(1) A corrugated board consisting of two layers
of corrugated medium, a middle liner and two facings.
(2) A bag with two separate layers of material.
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Draft
The
degree of taper on the side wall of a container or the angle of clearance
required to facilitate removal of an article from a mold.
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Drawn and ironed can
(D&I)
After the
can has been drawn (see also: Drawn
container) to form its basic shape the sides are thinned by ironing
further.
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Drawn and re-drawn can (DRD)
Steel or
aluminium two-piece cans with thicker walls than D & I cans (see above),
suitable for retorting. Relatively shallower than D & I cans.
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Drawn container
A
container made by forcing a flat metal or plastic blank or sheet into,
through or over a die.
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Dropper cap
A metal
or molded plastic closure with a glass or plastic dropper and small rubber or
plastic bulb attached. The dropper is a glass or plastic tube or pipette to which a the rubber bulb
is attached to allow the controlled dispensing of drops of liquid.
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Drop test
Dropping
of a filled container from a known height to determine its resistance to
rupture, leakage or damage.
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Drum
A
cylindrical shipping container usually with a capacity from 10 to 240 litres
made of steel, plastic, or fibreboard.
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Drying tunnel or oven
A device
attached to a printing press, coater or laminator designed to remove solvents
from inks or adhesives and to cure the inks or adhesives if necessary.
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Dunnage
Any
blocking, bracing or supports used to hold a load in position or to fill
empty space within a package or container to prevent damage. Often employed
in distribution packages for rail and truck shipments.
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Duplex board
A
paperboard normally made of two layers of different types of pulp. The top
layer is usually white made out of bleached chemical pulp. Used for folding
cartons.
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