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Glossary of Terms 

 
Glossary of Terms
 
Contact us to talk with an SEC expert.
 
A B C D F G I J K L O P R S T U W

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A.

Adjustable Die – a die-cutting system using moveable blades, which
can be adjusted to make custom sizes. The flaps will be square and
slightly tapered. Cannot be used for diagonal seam envelopes.

A-Size – Announcement envelope, open side/side seam style with a square flap.

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B.

Bangtail – a perforated coupon attached to the back flap of a return envelope, the coupon is designed to be torn off before the envelope is sealed.

Baronial – an envelope with a pointed seal flap, open side with a side or diagonal seam. Commonly used for announcements, greeting cards or social stationary.

Blank – the die cut envelope shape, before it is folded.

Bleed – the printed image that extends past the envelope folds.

Business Reply Envelope (B.R.E.) – an envelope with the return address,
indicia and permit printed on it, the original sender pays the postage.

Booklet – a large open side envelope used for catalogs, annual reports
and brochures. Also refers to any open side/side seam envelopes with
the seal flap opening on the larger side.

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C.

Catalog – open-end style envelopes, with
the seal flap opening on the smaller side.

Center seam (CS) – the seam on the back side of a catalog
envelope, running from the bottom flap to the throat.

Closed Die – die cuts paper into fixed shapes and sizes
– with usually rounded corners. Also called high die or hard die.

Commercial – a term commonly used for most business
style envelopes, open side, with or without windows.

Corner Card – the return address and/or logo
printed on the upper left corner of an envelope.

Cutting Die – a tool that cuts paper into the proper
shape so that it can be “converted” to an envelope.
These dies are made of forged, specially treated steel.

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D.

Diagonal Seam (DS) – seam style used in open side envelopes, invitation and baronial envelopes. The seam runs from the back corners, diagonally to the middle.

Die – the precision tool used to cut out
envelope blanks, windows and other shapes.

Double Outside Side Seam – when the seams on an open
side envelope are glued to the outside of the back flap.

Drop Gum and Perf – a remit style envelope with a perf and the gum strip on
the seal flap, placed close to the folded edge. The remit flap is used a tear-off coupon that can be returned in the envelope. Also called a “Two-Way Mailer”.

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F.

Face – the front of the envelope, the side without seams.

Flaps Extended – when the seal flaps are extended, not folded down.

Flush cuts – to cut the top flap off the envelope
— creating a type of pocket or pouch.

Fugitive Glue – a hot melt glue that can hold two sheets
of paper together, yet allows the sheets to be separated
from each other doing minimal to no damage to the paper.

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G.

Grain – the direction in which most of the fibers lie on a sheet of paper.
Paper folds easier on the grain, has more resistance to tearing and
cracking, and has greater tensile strength in the direction of the grain.

Gripper Edge – the leading edge of paper
as it runs through a printing press or folder.

Guide Marks – a method of using cross line marks on the offset press
plate to indicate trim, centering of the sheet, centering of the plate.

Gum Strips –

 Horseshoe – remoistenable 3-sided gum on gum and folded products.
 
Strike
– start and stop gum lines which can be
horizontal or vertical for gum and folded products.

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I.

Ink Jetting – this process allows us to “spray” variable data onto the forms
as we are converting them, on both sides of the sheets. Most commonly,
this is personalized information – name, address, etc? It can also be used
for sequential numbering, keycoding, or any other type of variable data that
is not practical to deal with as plate changes during your print run.

Inside Tint – printed design or solid on the inside of the envelope.
Used to increase opacity for security envelopes or for graphic interest.

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J.

Jet Presses – generic term for printing
presses that print pre-manufactured envelopes.

Jogged - a process using a vibrating table to register a stack of paper.

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K.

Kraft – a paper grade made from unbleached, bleached
or colored wood pulp by the sulfate process. Kraft papers
have a coarser finish and are noted for their strength.

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L.

Laid – type of finish on paper, characterized by a closely lined appearance.

Lift – a stack of jogged paper to be die cut. The amount in each lift
(approximately 150-200 sheets) varies with weight and type of paper.

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O.

Offset Paper – also known as book or text weight paper. General description
of any paper, coated or uncoated, primarily used for offset printing.

Offset Printing – highest degree of precision, clarity, and quality.

Opacity – a property that measures the degree to which
paper stops light from passing through. The more opacity a
paper has, the less can be seen of the envelope contents.

Open End (OE) – a style of envelope where the opening is on the shorter side and has a center seam on the back. All catalog and coin envelopes are open end.

Open End/Side and Bottom Seam – a style of envelope
where the opening is on the shorter side and a single side
seam on the back. It can be on the right or left side.

Open Side (OS) – a style of envelope where the opening is on the longer side and has either diagonal or side seams. All commercial or booklet envelopes are open side.

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P.

Patch Material – translucent or clear material
covering windows. Poly, glassine or cello.

Perforation – creating a line of small dotted
holes
into a piece of paper to make tearing easy.

 Strike – start and stop perf. which may be
horizontal or vertical for gum and fold products.

Profile Die – are made from steel and wrap around a cylinder on the envelope converting equipment. It is a less expensive die compared to the closed die, average cost is $250 vs. $1,800. It minimizes movement/variance and allows
for a complete customization of envelope sizes and flap shapes.

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R.

Ream – 500 sheets of paper

Regular – a commercial style of envelope
that does not have a window. (4-1/8 x 9-1/2)

Remittance – an envelope with a large seal flap,
approximately the same size and shape of the envelope.

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S.

Score – a shallow crease where a sheet of paper will be folded.

Seal Gum – type of envelope adhesive.

 Remoistenable gum – requires a moistening agent to be sealed.
 
Latex gum – gum adheres only to itself. A strip of gum
applied to the seal flap and a corresponding strip on the
back of the envelope, when pressed together, forms a bond.
 
Kleen Stick – self-adhering strip of gum applied
to the seal flap with a protective tape covering.

Seams – where the envelope flaps are glued together.

 Center seam – located approximately
in the center of an open-end envelope.
 
Diagonal seams – seams running diagonally from
the corners to near the center of the envelope.
 


Side seams – the seam runs parallel to the fold.

Inside side seam – the side seams fold under the back flap.
Outside side seam – the side seams fold over the back flap.

 Welded Seam – created by laying glue perpendicular to
a folded edge of paper. The two edges are “glued” together.

Security Tint – a printed pattern or solid on
the inside of an envelope to increase opacity.

Split Seal Gum – a broken gum pattern on the seal flap. Prevents the
gum from sticking on the back panel during storage in humid conditions.

Standard Substance Weights – Wove

 24 lb. – used for most open side and commercial envelopes.
Comparable to a 60 lb. offset.
 
 28 lb. – used for larger envelopes, booklet and catalogs.
Comparable to a 70 lb. offset.
 32 lb. – used for heavy duty and clasp envelopes.
Comparable to a 80 lb. offset.

String and Button – a closure with a string attached to
the flap and a button attached to the body of an envelope.

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T.

Text – type of high quality paper, manufactured in white or colors from bleached chemical wood pulp and/or cotton fibers. Available in a variety of finishes.

Thumb cut – an envelope with no seal flap and a “thumb” shape cut
into the top of the face, on one side. A double thumb cut is cut on
both the front and back of the envelope. Used for files or film storage.

Tip Down – process of adhering one item to another. Ex: attaching a
membership card, stickers, magnets, etc. to a piece of paper with fugitive glue.

Top – the side of the envelope that opens.

Two-Way Mailer – a remit style envelope with a perf. and the gum strip on
the seal flap, placed close to the folded edge. The remit flap is used a tear-off coupon that can be returned in the envelope. Also called a “drop gum and perf”.

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U.

Unit 1 Mailer – Bind-ins, self-mailer. IN-line remoistenable gumming,
folding (inc. gate, right angle, and doulble parallel), perf., scoring, slitting.

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W.

Window – an opening cut into an envelope,
which allows the contents to be viewed.

 Open Face Window – a window opening with no material covering.
 
Patched Window
– A window opening with material covering.
 
Poly
– most common of window coverings, slightly opaque in appearance.
 
Cello
– a completely transparent covering.
 
Glassine
– the most opaque of window coverings.

Window Position – the location of the window on the envelope, as
measured from the left and bottom edges, with the opening at the top.

Wove – most commonly used envelope paper. Comes
in 24# or 28# weights, white and a variety of colors.

 

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Contact us to talk with an SEC expert.


Credit Application
Electronic Artwork Preflight
Envelope Die Lines
Equipment List
Freight Sheets
FTP Instructions
Number Out
Purchase Order Guideline
Questions on Personalization
Quick Tips for Tip Downs
Unit 1 Basic Layout
What Makes a Great Envelope
Gruppo Cordenons Envelopes
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