ENCYCLOPAEDIA

A

Air bubble pockets
Pockets with a bubble wrap, made of plastic foil which is used for sending sensitive goods

Air mail envelopes
Lightweight envelopes for sending air mail letters

Airpoc pockets
Pockets with a bubble wrap, made of plastic foil which is used for sending sensitive goods

Angle cut
Envelope cut which is often used for greeting cards. The diamond flap can be put in the bottom flap.

Apply labels
putting on of additional labels (e.g. rubbing fields) during the envelope production

Aquaset printing
This is a special doctor blade print (flexo print) with a very high quality. lt is a printing procedure with environment friendly water-colours. lt follows from that that the print is more brilliant, very similar to an offset print.

ASK
German abbreviation for outside side seams This means that the side flaps are glued on the bottom flap. This is very important for machineable envelopes (mailing wallets).

B

Band
A band which is used for the banding of envelopes or pockets into one pack. The paper band can have different widths and can be printed. The paper band can have different widths and can be printed.

Blank-fed
In the blank-fed process, blanks are punched and then folded by the envelope machine. This manufacturing type is mainly used in the production of special sizes and smaller volumes.

Blanks produced from one sheet
Blank

Block bottom
Additional gusset in the bottom of a gusset pocket or a sample bag used for the mailing of bulky contents.

Blue Angel
Environmental protection sign for recycling paper made of 100 % waste paper.

Board back pocket
Pocket with board as backing for a higher stability and some protection of contents. Ideal for photographs.

Bonding
lndicates the type of gumming of the mouth flap. We differ gummed, self-seal, self-adhesion (re-sealable) and peel & seal.

Book printing
The oldest printing method in which the printed parts are raised. This method is very expensive because the machines run very slowly. For this reason it is only suitable for small orders.

Bottom flap
The lower folded flap of an envelope or packet

Brochure wallets
Envelopes used for the insertion and mailing of brochures.

Bursting pressure
Special term for the technical strength of paper. The higher the bursting pressure (kg/cm2) the stronger is the paper. E.g. white kraft paper has a higher bursting pressure than white offset paper. That is why kraft paper is more used in the production of large pockets.

C

CD-ROM wallets
Special envelopes for the mailing or keeping of CD-ROMs. They are often fitted with a big round window on front.

Cello
Packages for the retail market. Envelopes or pockets are cello- wrapped or shrink-wrapped in different batch sizes. Additionally overlays – so called inlays or header cards – with e.g. product information concerning are inserted. Additionally overlays – so called inlays or header cards – with e.g. product information concerning are inserted.

Centre seam
Special cut of pockets. Both side flaps are gummed in the centre of the back side of the pocket. There is also the misaligned centred gumming where the gumming is not exactly in the centre.

Cliches
Printing plate used for the flexo printing

Coated papers
For having a close surface and therefore to reach a better printability (half tones) a coating slip is coated on the so called coating base paper and constantly distributed in the allowed line weight. For that there are different methods, e.g. blade coating, roll coating, brush coating, air jet coating. The coating slip consists for example of China clay, chalk, casein, plastic dispersion. One-side coated (chromo paper) and both side coated matt coated, egg-shell , gloss coated paper and the sorts which are coated in the paper machine form the wide group of illustration printing and art paper.

Colour mixing unit
Computer aided unit for mixing colours to guarantee an exact constancy of the colour mix and a colour fidelity in the print. (lt is also used for repeat orders).

Colour change
Change of colour within a printing unit

Convert only
Production in which for example, either the paper or the printed sheet is provided by the customer

D

Die
Shaped knife, with which the single blanks are punched from the paper sheet by using a punching tool.

DIN
Deutsche Industrie Normen German standard which determines the sizes for envelopes (see sizes)

Direct mailing wallets
Part of promotional exercises. Not only the content of the envelope but also the envelope itself is printed. So the user is already attracted when he takes the envelope out of the letter box.

Doctor blade printing
it is a developed type of flexo-printing. A doctor ensures that the slave of the colour is exactly and always a constant colour quantity comes on the flexo-block and so a fair print is possible.

E

Eco-boxes
the residual width after the finishing of the main web. The paper producer tries to exploit with side webs their maximum machine width as much as possible.

Envelope
Envelope with the opening on the long side

Envelopes
Envelopes for a machineable insertion

Envelope weight
The envelope weight indicates the weight of 1000 envelopes. The following formula is regarded as rule of thumb: height (mm) x width (mm) x grammage (g/m2) x 2,5 : 1,000,000

Environmental angel
Environmental protection sign for recycling paper made of 100 % waste paper.

Euro-pallet
Within the Europool changeable pallets in the size 80 x 120 cm

F

Folding tolerance
Can vary by about +/- 2 mm during folding of envelopes or pockets, this is important for the print design (see also print bleed)

Flap tuck
type of closure with a punched tongue on the mouth flap which is inserted in a slit on the bottom flap

Flapless pockets
An on two sides open pocket that enables fast inserting of the documents.

Flavour print
The colours contain a special scent

Flexo printing
Printing method where the printing block consists of rubber blocks and the print is transmitted on the printing material under the use of printing inks which dry by an evaporation of solvents.

Floppy disk envelopes
Envelopes for floppy discs, very seldom used nowadays.

Foil window
Window with transparent foil

Format paper
Paper sheet used for the blank-fed

Franking pockets
Pocket for franked envelopes posted at the post office

G

Glassine
Glazed transparent paper. lt is often embossed (e.g. intermediate layers in photograph albums). lt tends to waving (it should especially be taken into consideration with windows).

Grammage
lndicates the basis weight of paper in gsm.

Gripper edge
ls necessary for the offset printing to hold en envelope or printed sheet. This area cannot be printed.

Green point
A sign that marks wrappings which can be disposed via the dual system.

Gummed
Gum which adheres when moistened.

Gumming
lndicates the type of gumming of the mouth flap. We differ gummed, self-seal, self-adhesion (re-sealable) and peel & seal.

Gusset pockets
Pockets with additional gussets on the sides and/or in the bottom. lt is used for the mailing of bulky contents.

H

Halftone screen
indicates the number of dots on 1 cm:
Flexo: 28 – 30
Aquaset: 44 – 45
sheet-fed offset: 70 – 80

Hot gum
Special glue with high holding power. The glue is applied by spray nozzles which guarantee an exact proportioning and positioning.

HKS fan
Standard colour system for the exact colour specification.

I

Ideal size
Paper size, with which the optimal numbers of blanks from one sheet is reached.

Inner print
Printed inside of envelopes/pockets, mostly an opaque or a confusion of numbers; is used for an additional visual protection

Internal mail pockets
Pockets for company internal correspondence. They often have often additional holes and are normally not gummed.

ISK
German abbreviation for inside side seams That means that the side flaps are glued under the bottom flap.

J

Jiffy pockets
Padded pockets to protect goods which need to be protected against impacts in the postal system.

M

Mailing
Advertising in which envelopes are used

Manilla brown
paper which is mainly used in the pocket production

Machine direction
Direction in which most fibres lay. The machine direction is important because the paper fibres differently stretch both in longitudinal direction as well as the cross direction, dependent on the humidity.

Mailing wallets
Envelopes used for machineable insertion

Mechanical envelopment
Envelopes are filled and closed by a machine (inserting machine)

Measuring Magnifier
Magnifying glass that helps to find which halftone screen has been used. That means how many dots are printed on a length of one cm.

Mouth flap
Flap for the closure of the envelope or pocket.

N

Numbering
Print of sequential numbers.

O

Open aperture
Punched out window without foil

Open flap
The mouth flap is pre-scored but not closed. The open flap is mainly used in the sheet-production of self-seal envelopes.

Offset print
A method in that printing and non-printing parts lie on the same plane. The colour is transferred from the printing plate on the paper by and offset /rubber blanket. A high quality printing method.

One-way-pallet
Not in the Europool changeable pallet system.

Outer print
Print that you can see on the outside of the envelope

Ozalid
Heliographie which is served for checking up the state of assemblies.

P

Pallet unit
Quantity of envelopes per pallet.

Peel & seal
Seif sealing on the one side protected by a silicone strip

Perforation
Stamping or cutting of many small wholes or grooves which are on one line and which are used for the easy-opening or serving of a part of the envelope.

Plate change
change of the print within one impression.

Pockets
Pockets have the mouth flap on the short side. Pockets are available either with glue at one side on the back of the envelope or with centre gluing.

Postage meter
Franking machine that franks envelopes so that they do not have to be stamped at the post office.

Postage relief
A relief in the gumming on that point where the stamp has to be stuck. lt avoids a sticking together caused by the humidity of the glued stamp.

Pre-Creasing
A crease line or score, serves as a help for the later folding of sealing flaps and is mainly used for gusset envelopes or gusset pockets. lt makes the flap closure much easier.

Pre-Scoring
A score line or crease, serves as a help for the later folding of sealing flaps and is mainly used for gusset envelopes or gusset pockets. lt makes the flap closure much easier.

Print Bleed
lf the print is fed directly to the edges of the finished envelope so called bleed-off can occur. This means that for various reasons (punching differences, folding differences or printer’s errors) a part of the print of the face is visible on the back or vice versa.

Print bleed
The print extends beyond the edges of the envelope or paper.

Print coverage
lndicates the printed parts of envelopes or pockets in percentage. A coverage of 100% equals full print coverage.

Print on finished products
A later offset print on already produced and finished envelopes or pockets

Proof
proof which is digitally made.

Proof
Pre-print sample to enable the customer to both check and confirm details.

Proof copy
Proof which is made before production starts. With the proof our customer is able to check the print and to confirm it.

Punching tolerances
During the punching of sheets differences of +/- 2 mm can occur. This is necessary for the printing.

Punching Waste
The gap between the single blanks is called ‘Punching Waste’.

R

Recycled envelopes
Envelopes made from recycled paper.

Reel-width
Width of the paper reel that is necessary for the production of an envelope/pocket.

Reel-fed
In this production method, the paper runs from a big reel directly in the folding machine. The reel width determines the width of the envelope including side flaps. The shape of each flap has the shape of the throat of the back of the following envelope. This means that there is only one separating cut. This type of production causes minimal paper loss.

Reel production
In this production method, the paper runs from a big reel directly in the folding machine. The reel width determines the width of the envelope including side flaps. The shape of each flap has the shape of the throat of the back of the following envelope. This means that there is only one separating cut. This type of production causes minimal paper loss.

Reel changer
Device on reel machines for the automatic change of paper reels. lt ensures that there is no stop period.

Reinforced Paper
Paper in which threads have been included for extra strength.

Reply envelopes
Used for mailings which have a response as aim. The reply envelope is smaller than the mailing envelope and is put in this. Normally, the answer address is already printed on the envelope. The reply envelope is smaller than the mailing envelope and is put in this. Normally, the answer address is already printed on the envelope.

S

Sample bags
Pocket used for the despatch of samples which have side gussets and a bottom gusset (square bottom) and which are without mouth flap. They are traversly grooved and punched. The pocket is folded at the top after the filling and then it is fixed with plastic closure in the holes.

Securitex®
modern compound material with which characteristics like printability, edge tearing resistance as well as optimal handling are reached by a combination of special papers with foils. Securitex is: easy printable, water resistant, non-transparent,extremely secure.

Self sealing
Two component adhesive: This adhesive glues only by the binding of the two components. One area of latex is on the mouth flap, the second area is on the back of the envelope. The envelope closes only when the flap is tilt.

Secured letter wallets
In secured letter envelopes, the bottom flap is pulled up and is then folded. This avoids the contents to fall out of the envelope or that it remains unnoticed or unseen.

Security slits
Slits in the mouth flap, which tear if the envelope is opened. Security slits prevent an unnoticed opening of the envelope. They are mainly used for seif seal envelopes.

Security closure
A good value alternative as a type of closure especially for internal mail pockets. A back lined paper prevents that the content of the packet falls out.

Side seam gummed
lf you look at the pocket from the back with the mouth flap at the top, the side flap, or ‘seam’ is glued on the right hand side. This is called ‘side seam gummed’ as opposed to ‘centre seam gummed’.

Side-web
the residual width after the finishing of the main web. The paper producer tries to exploit with side webs their maximum machine width as much as possible.

Silicone strip
a strip which is used for covering the adhesive of peel and seal envelopes.

Scale
The basic colours in the four-colour printing:
Cyan
Magenta
Yellow
Black

Sheet size
The sheets are printed with a high quality offset print before they are punched.

Sheet fed offset
The sheets are printed with a high quality offset print before they are punched.

Spot gumming
The side flaps are only spot gummed.

Standard inner print
Mayer-Kuvert produce a grey flexo opaque in HKS 92- 50%

Straight flap
Cutting type with a straight mouth flap

T

Tear strip
An included thin strip which enables a tearing of the envelopes on the side (see Zipp-o-let)

Template
lt is not worth for smaller orders to buy a punching tool. In this case a template of the blank is made and is punched out of the paper by an adjustable knife.

Tissue lined envelopes
envelopes with a lining of tissue inside.

Transparent Paper
term for light-transmissive or translucent drawing paper, booking paper or glassine

Trapezium cut
cut for envelopes or pockets which can be machineable filled.

Tyvek
tear strengthened and water resistant spunbonded material

V

Varnish
A special varnish is put onto the print which is distributed like a colour on the paper for the protection of the print in offset printing. ls mainly used in the production of high quality prints or solids ls mainly used in the production of high quality prints or solids

Velcro fastening
Especially for the flap sealing of internal mail pockets. Offen can be reused.

Versions
Change of the print within a bigger total order volume

W

Wage pockets
Small pockets used for the cash payment of wages. Mayer- Kuvert produce them from glassine without any print or from chamois paper, 80 gsm, with print for the listing of the pay-slip.

Web offset
The paper is directly printed from a broad reel in the offset printing method, cut into smaller reels and then finished from the reel directly in the envelope machine.

Window background pattern
Inside print behind the window of an envelope which is readable after the content has been taken out.

Window envelopes
Envelopes with window

Window knife
Knife which is used to punch out the planned window in the envelope/pocket. At Mayer-Kuvert, nearly all forms can be produced by the use of cutting foils.

Window position
lndicates the position of the window. At Mayer-Kuvert it is indicated as follows: position from the bottom and from the left hand side. In case of envelopes: flap on the top seen from the face; in case of pockets: flap on the right hand side seen from the face.

Window punching
The window is punched into blanks in a separate operation before the envelope is folded.

X

X-ray film pockets
special pocket for the mailing/ transportation of x-ray-film.

Z

Zipp-o-let
Envelope with an additional tape on one narrow side of the envelope which makes the opening of the envelope easier. You do not need a letter opener.