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Glossary
of Graphic Communication Terms
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Against the Grain - At
right angles to the direction of the grain of the paper.
Alteration
- Any
change made by the customer after copy or artwork has been given
to the service bureau, separator or printer.
The change could be in copy, specifications, or both. Also called
AA, author alteration or CA customer alteration.
Aqueous
Coating - Water
based coating applied like ink by a printing press to protect and
enhance the printed surface.
Basis
Weight - Weight
in pounds of a ream (500 sheets) of paper cut to a given standard
size for that grade; example: 500 sheets
of 17" x 22" 20lb bond paper weights 20 pounds.
Bleed
- Printed
image that extends beyond the trim edge of the sheet or page.
Blind
Image - Image
that is debossed or embossed, but not printed with ink or foil.
Blueline
- Prepress
photographic proof made from stripped negatives where all colors
show as shades of a single color on white
or yellow paper. Also called brownline or silverprint.
Brightness
- In
paper, the reflectance or brilliance of the paper surface.
Caliper
- The
thickness of paper, usually expressed in thousandths of an inch
(mils). Typically measured with a device called a
thickness measure or micrometer.
Chalking
- Refers
to improper drying of ink. Pigments dust off because the ink has
absorbed too rapidly into the paper.
CMYK
- Abbreviation
for cyan, magenta, yellow and (key) black, the four process ink
colors.
Color
Balance - Maintaining
the proper ratio of cyan, magenta, and yellow ink to produce a picture
with the desired color and without
an unwanted color cast or color bias.
Color
Bars - The
color strip on proofs and press sheets that is used as a guide for
the printer in determining the amount and density
of ink needed to produce the desired result.
Color
Calibration - A
means or method of setting a computer monitor, scanner or color
printer to a standard set of color values so as
to ensure that all the colors remain consistant throughout each
step of the imaging process.
Color
Cast - Discoloration
of an entire image or portion of an image caused by an overabundance
of one color.
Color
Seperations - The
four-color negatives or postives which are the result of changing
full color photos or art images into the four
process colors (cyan, magenta, yellow and black) by the use of filters.
This process is almost exclusively done with computers now.
Composite
File - A
postscript file that represents color pages containing picture elements
specified in terms of CMYK color space
as opposed to black and white "greyscale" pages which
represent seperations.
Composite
Proof - Single
test sheet showing position and color of all elements as stripped
up.
Comprehensive
(Comp) - A
detailed dummy or sketch of a design, intended to give a clear sense
of how the finished piece
should look.
Computer-To-Plate
(CTP) - Describes
a system in which the use of desktop publishing software, electronic
prepress workstations,
and platesetters allow the imaging of metal plates for any format
of press without the use of film, stripping or traditional
platemaking. This process results in lower costs while shortening
the amount of time needed to get a job on press.
Copy
- Original
job material (paste-ups, film, photos, and other graphics) furnished
for the print job.
Coverage
- The
amount of ink on a page or sheet, usually given in percentages.
Crop
Marks - Symbols
placed in the margin outside the image area that indicate to the
printer and bindery the area to be printed
and or trimmed from the image.
Cure
- To
dry inks, varnishes or other coatings after printing to ensure good
adhesion and prevent set-off.
Curl
- The
distortion of paper due to differences in stucture or coatings from
one side to the other or from absorption of moisture
on the press.
Densitometer
- Instrument
used to measure density or thickness. Reflection densitometers measure
light reflected from paper and
other surfaces. Transmissiion densitometers measure light transmitted
through film and other materials.
Die
- Device
for cutting, scoring, stamping, embossing or debossing. Usually
custom manufactured for a specific job.
Diecutting
- Using
sharp steel rules to cut special shapes from printed sheets. Diecutting
can be done on either flatbed or
rotary presses.
Dot
Gain - The
increase inthe printing dot size from athe halftone film to the
printed substrate resulting in darker tones. This
variance occurs on all printing presses but can be minimized by
proper plate to blanket calibration, or software based film
calibration for a specific printing press.
Doutone
- A
two-color halftone produced by overprinting two halftone screens
made from the same photograph (usually a black and
white photo), as a means of generating a monocromatic image with
a full range of tonal gradations.
Dye
Sublimation - A
process used for color proofing systems and heat transfer printing.
The "dye" is a colorant that undergoes
"sublimation" which is the direct transformation from
a solid into a gas without passing through the liquid phase. When
the
substance is cooled, it turns back into a solid again, also without
passing through a liquid stage. In the case of proofing systems,
the colorrant is a solid wax.
Emboss
- To
press an image into paper so it lies above the surface.
EPS
- An
abbreviation for Encapsulated PostScript (most common in graphic
arts); for Electronic Publishing System; and
External Page Storage. Encapsulated PostScript is an Adobe Systems-developed
file format. It is a device-independent
PostScript representation of a graphic or other object. It stores
files as vectors and includes a low-resolution bimap
representation for quick on-screen viewing.
File
Transfer Protocol (FTP) - In
networking and telecommunications, a specific (and eponymously named)
file transfer protocol
used for logging into remote computer networks, browsing and searching
directories, downloading or uploading files without data
loss. Typically requires a software program to impliment.
Flexography
- A
printing process that used a raised surface of flexible rubber or
photopolymer printing plate mounted on a rotary
drum and thin, fast drying inks to print on almost any roll stock.
Foil
Stamp - To
press a heated die onto a sheet of foil, releasing the foil from
its backing and adhering it to a substrate.
Font
- A
complete set of type charaters in one typeface and typesize.
For
Position Only (FPO) - Refers
to interior quality copies of photos or art used on mechanicals
to indicate placement and
scaling, but not intended for reproduction.
Four-Color
Process - Use
of cyan, magenta, yellow and black to create a full color image.
Fullfillment
- The
storing of a customer's materials until that customer requests delivery
to itself or a third party. Also, the
fullfilling by a vendor of a request received from a customer by
phone, mail, or electronic means. Also known as "pick and pack."
Gang
(Gang Run) - To
print two or more finished products on the same sheet during a press
run.
Ghosting
- Phenomenon
of a faint image on a printed sheet where it was not intended to
appear.
Grain
(Grain Direction)- The
direction in which the fibers are aligned in a paper stock. Determined
at the manufacturing stage.
Gripper
Edge - The
leading edge of a sheet which is held by the grippers on a printing
press as the sheet passes through the machine.
Gripper
Margin - The
unprintable area of the paper where it is gripped as it passes through
a printing press. Usually measures a half
inch or less depending on the press manufacturer.
Halftone
- An
image composed of tiny dots whose variations in size create the
illusion of variations in tone. traditionally, a halftone
screen was used to convert a continuous tone image into a halftone;
such screening is done electronically now.
Hickey
- Spot
on a printed sheet usually due to dust, dried ink or lint fibers
from paper.
Imagesetter
- A
high-resolution laser output device that writes data on photosensitive
paper or film. The data is processed by
a RIP and can record halftones and line images as well as type.
Imposition
- Laying
out pages in a press form so that when the pages are printed and
folded they will be in the right order.
Imprinting
- To
print new copy on a previously printed sheet, such as imprinting
an employee's name on business cards.
Kiss
Cut - To
diecut the top layer but not the backing of self-adhesive paper.
Knock
Out - To
clear an area of absolutely every printing dot; or to outline an
image and drop out all dots surrounding it.
Most common application is to knock out type from a background image
or solid ink color to make it visible as "white"
or to color of the paper beneath it.
Laminate
- To
bond a plastic film by heat and/or pressure to a printed sheet for
protection and appearance.
Layout
- A
drawing that gives the general appearance of the finished piece
and usually indicates the relationship between
illustrations and copy.
Leading
- (ledd-ing)
The linespace, or white space, between lines of copy measured in
points.
Letterpress
- Method
of printing where the wrong-reading raised surface of a printing
plate is inked and impressed directly
onto paper.
Line
Copy - High
contrast images or type without shading which do not require halftone
screening.
Lithography
- Method
of printing using plates whose image areas attrach ink and whose
non-image areas repel ink. The images
are first printed onto a rubber blanket and then offset (transferred)
to paper.
Makeready
- The
process of setting up and adjusting a printing press for a particular
ink, paper and set of printing conditions
prior to a press run. Also, the paper used or consumed in making
these adjustments.
Margin
- The
blank space around the image area of a page, also referred to as
a gutter.
Mechanical
- Complete
pages, with text, line art, and crop marks in postion, ready to
be photographed or output to film.
Moire
- Objectionable
patterns that appear at regular frequencies when two or more screen
patterns are placed over one
another. may be caused by misalignment, incorrect screen angles,
sipping or slurring.
Mottle
- Spotty
or speckled printing, can be caused by a breakdown in ink viscosity
during a press run. It is most visible
in solid areas of ink.
Negative
- The
film image of a completed page from which plate will be burned.
the light and dark parts of the image are tonally
reversed from the original copy.
Offset
Printing- Usually
refers to offset lithography. The image prints by transferring ink
from a plate to a rubber blanket
that deposits the ink onto the subtrate instead of directly from
plate to paper.
Pagination
- Numbering
pages in a certain order. Also, the process of performing page makeup
on a computer.
Paste-up
- Placing
graphics and text in a mechanical either manually or electronically.
PDF
- Abbreviation
for Portable Document Format, a file format developed by Adobe Systems.
PDF is a universal file format
that preserves the fonts, images, graphics, and layout of any source
document, regardless of the application and platform
used to create it. Adobe PDF files are compact and complete, and
can be shared, viewed, and printed by anyone with free
Adobe Reader software. You can convert any document to Adobe PDF
using Adobe Acrobat software products. There are
also other vendors, like Global Graphics, who also market their
own flavor of PDF.
Perfect
Binding - Signatures
that are collated on top of one another, then glued with a wrap
around cover, as opposed to
saddlestitched binding in which the signatures are folded inside
one another and stapled or saddlestitched together
at the spine.
PMS
- Acronym
for Pantone Matching System®, a set of preprinted color swatches
used as the universal color communication
standard in the printing industry. Pantone inks are formulated by
premixed amounts of pigment colors to formulate a desired
color or shade of color.
Preflight
- Procedures
used to make sure that digital files are correctly prepared for
reproduction.
Prepress
- Camera
work, color seperating, stripping, platemaking, and other functions
performed by the printer, seperator or
service bureau prior to the actual printing. Most prepress is done
electronically now.
Prepress
Proof - Any
color proof made using inkjet, toner, dyes or overlays.
Press
Check - When
a customer is at the printing press in order to approve the job
as it is printed.
Ream
- 500
sheets of printing paper. Stacks and skids of paper often include
slips of paper (ream markers) marking the division
of the stack into reams.
Register
Marks - Crosses
or other designs that are placed outside the image area of a proof
and press sheet to prevent
elements of the job from being misaligned. Also referred to as targets
or target marks.
Registration
- The
correct positioning of one color in relation to another during the
printing process.
Remote
Proofing - Digital
transmission of a proof to a remote office or customer location
for output and evaluation at
the remote site.
Resolution
- Refers
to the sharpness of an image. Is determined me to number of dots
or pixels per square inch.
Reverse
- Type,
Graphic or illustration produced by printing ink around its outline,
thus allowing the underlying color
or paper to show through and form the image. The image "reverses
out" of the ink color.
RGB
- Red,
Green and Blue. The additive primaries which are used in video monitors.
RIP
- Abbreviation
for Raster Image Processing, a hardware and/or software system that
translates page description
commands into bitmaps for output.
Saddlestitched
- A
form of binding that uses staple-shaped wires through the gutter
fold or spine of a booklet.
Score
- To
compress paper along a straight line so it folds more easily and
accurately.
Screen
Angles - Angles
at which the halftone screens are placed with relation to one another
to avoid undesirable moire patterns.
Screen
Printing - Method
of printing that uses a squeegee to force ink through an assembly
of mesh fabric and a stencil.
Set-off
- Ink
from a printed sheet rubs off or marks the next sheet as it is being
delivered. Also called offset.
Show-through
- The
undesireable condition in which the printing on the reverse side
of a sheet can be seen through the sheet
under normal lighting conditions.
Spiral
Bind - To
bind using a spiral of continuous wire of plastic looped through
holes. Also called coil bind.
Spot
Color - Individual
color or colors that are utilized to highlight illustrations or
type. Spot color is frequently printed with
non-process inks, (such as Pantone Inks) although process inks can
be used.
Spot
Varnish - Varnish
applied only to certain portions of a sheet to highlight those areas.
Stripping
- The
process of manually creating composite films and fully imposed flats
for platemaking.
Substrate
- Any
surface on which printing is done.
Thermography
- A
method of printing in which the image is coated with a resin which,
when heated, results in the image being
raised off the surface of the paper.
TIFF
- Accronym
for Tagged Image File Format. A graphics and page layout file format
for desktop computers. Used as an
intermediary file format for both color and black and white images.
TIFF is used to transfer documents between applications
and computer platforms.
Trade
Shop - Service
Bureau, printer or bindery working primarily for other graphic arts
professionals, not for the general
public. Some trade shops require a resellers permit and or trade
group affiliation to do business with them.
UV
Coating - Liquid
applied to a printed sheet, then bonded or cured with an ultraviolet
light.
Varnish
- A
thin, protective liquid coating applied to the printed sheet for
protection or appearence, drys by oxidation and is not
cured in any way.
Work
and Tumble- To
print one side of a sheet of paper, then turn the sheet over from
gripper edge to back using the same
side guide and plate to print the second side.
Work
and Turn - To
print one side of a sheet of paper, then turn the sheet over from
left to right and print the second side.
The same gripper edge and plate are used to print both sides.
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