Glossary Of Terms

PDI takes great pride in making our clients feel confident about their jobs during the production process. To help you gain a better understanding of what’s happening to your project, we’ve compiled a glossary of terms that we commonly use in our industry.

• Absorbency

  The ability of a material to take up moisture

• AC

  Author's Correction

• Accordion Fold

  A type of paper folding in which each fold runs in the opposite direction to the previous fold creating a pleated or accordion effect.

• Achromatic

  The non-colors... black, white and gray.

• Additive Colors

  In photographic reproduction, the primary colors of red, green and blue which are mixed to form all other colors.

• Air

  Large white areas in a design layout.

• Airbrush

  A compressed air tool that dispenses a fine mist of paint or ink; used in illustration and photo retouching.

• Alignment

  The condition of type and or art materials as they level up on a horizontal or vertical line.

• Alley

  A term for a random, coincidental path or a row of white space within a segment of copy.

• Alphabet Length

  The measured length (in points) of the lowercase alphabet of a certain size and series of type.

• American Paper Institute

  An organization that correlates all paper related information.

• Antique Finish

  Paper with a rough, sized surface used for book and cover stock.

• Apron

  The white area of text (or illustrations) at the margins which form a foldout.

• Aqua Tint

  A printing process that uses the recessed areas of the plate; ideal for graded and even tones.

• Aqueous Plate

  Water soluble plate coatings, which are less toxic and less polluting.

• Arms

  Those elements of letters that branch out from the stem of a letter, such as: "K" and "Y".

• Arrowhead

  A symbol shaped like an arrowhead that is used in illustration to direct a leader line. Reference, leader line

• Art Paper

  A paper evenly coated with a fine clay compound, which creates a hard smooth surface on one or both sides.

• Artwork

  All illustrated material, ornamentation, photos and charts etc., that is prepared for reproduction.

• Ascender

  Any part of a lower case letter which rises above the main body of the letter such as in "d", "b" and "h".

• Assembled view

  In illustration, a term used to describe a view of a drawing in its assembled or whole format.

• Author's Alterations (AA's)

  Changes made after composition stage where customer is responsible for additional charges.

• Autochrome paper

  Coated papers that are regarded as exceptional for multi-colored printing jobs.

• Back Lining

  The fixing of a material, either paper or cloth, to the back of a book before it is bound. Reference: case binding.

• Back Margin

  A term referring to the margin which lies closest to the back of the book.

• Back Step Collation

  The collation of book signatures according to reference marks which are printed on the back fold of each section.

• Backbone

  That portion of the binding, which connects the front of the book with the back of the book; also called "back".

• Background

  That portion of a photograph or line art drawing that appears furthest from the eye; the surface upon which the main image is superimposed.

• Backslant

  Any type that tilts to the left or backward direction; opposite of italic type.

• Backstep Marks

  Marks printed on signatures that indicate where the final fold will occur. When gathering and initial folding is completed, these marks appear as a stepped sequence.

• Balance

  A term used to describe the aesthetic or harmony of elements, whether they are photos, art or copy, within a layout or design.

• Balloon

  In an illustration, any line which encircles copy, or dialogue.

• Bank Paper

  A thin uncoated stock used for making carbon copies.

• Banker's Flap Envelope

  Also called wallet flap; the wallet flap has more rounded flap edges.

• Banner

  The primary headline usually spanning the entire width of a page.

• Barrier Coat

  A coating that is applied onto the non-printing side of paper to add to the opacity of that paper. Reference, opacity.

• Base Line

  This is a term used to describe the imaginary horizontal line upon which stand capitals, lower case letters, punctuation points etc.

• Basic Size

  This term refers to a standard size of paper stock; even though the required size may be smaller or larger.

• Basis Weight

  Basis or basic weight refers to the weight, in pounds, of a ream (500 sheets) of paper cut to a given standard size for that particular paper grade.

• BF

  An abbreviation for boldface, used to determine where boldface copy is to be used. Reference, boldface.

• Bible Paper

  A thin but strong paper (opaque), used for Bibles and books.

• Binder's Board

  A heavy paperboard with a cloth covering that is used for hardback binding of books.

• Binding

  Various methods of securing folded sections together and or fastening them to a cover, to form single copies of a book.

• Black Printer

  Refers to the film portion of the color separation process that prints black; increases the contrast of neutral tones.

• Blanket

  On offset presses a fabric-reinforced sheet of rubber to transfer the impression from the plate onto the paper.

• Blanket To Blanket Press

  A printing method in which there are two blanket cylinders through which a sheet of paper is passed and printed on both sides.

• Bleed

  Extra ink area that crosses trim line, used to allow for variations that occur when the reproduction is trimmed or die-cut.

• Blistering

  Although seemingly dry, paper does contain approximately 5% moisture. In cases where there is excessive moisture, and the paper is passed through a high heat-drying chamber, the moisture within the paper actually boils and causes a bubble or blistering effect.

• Block In

  To sketch the primary areas and points of reference of an illustration in preparation for going to final design or production.

• Blocking

  The adhesion of one coated sheet to another, causing paper tears or particles of the coating to shed away from the paper surface.

• Blow-up

  Any enlargement of photos, copies or line art.

• Blue-Line

  Photographic proof made from flats for checking accuracy, layout and imposition before plates are made. Also known as a dylux.

• Body

  The main shank or portion of the letter character other than the ascenders and descenders. Also: A term used to define the thickness or viscosity of printer's ink.

• Body Size

  The point size of a particular type character.

• Boiler Plate

  Repetitive blocks of type that are picked up and included routinely without recreating them.

• Boldface

  Any type that has a heavier black stroke that makes it more conspicuous.

• Bolts

  The edges of folded sheets of paper, which are trimmed off in the final stages of production.

• Bond

  A grade of durable writing, printing and typing paper that has a standard size of 17x22 inches.

• Book

  A general classification to describe papers used to print books; its standard size is 25x38 inches. A printed work which contains more than 64 pages.

• Bounce 1

  A registration problem, usually on copiers, where the image appears to bounce back and forth. A bounce usually occurs in one direction depending on how the paper is passing through the machine. This is usually accented by card stock (especially if it's over the machine's spec). When a customer refuses a job for whatever reason.

• Brace

  A character " }" used to group lines, or phrases.

• Break For Color

  In layout design, the term for dividing or separating the art and copy elements into single color paste-up sheets.

• Bristol Board

  A board paper of various thickness; having a smooth finish and used for printing and drawing.

• Broad Fold

  A term given to the fold whereby paper is folded with the short side running with the grain.

• Brochure

  A pamphlet that is bound in booklet form.

• Bronzing

  A printing method whereby special ink is applied to sheets and then a powder is applied producing a metallic effect.

• Buckle Folder

  A portion of the binding machinery with rollers that fold the paper.

• Bulk

  A term given to paper to describe its thickness relative to its weight.

• Bulk

  A term used to define the number of pages per inch of a book relative to its given basis weight.

• Bullet

  A boldface square or dot used before a sentence to emphasize its importance.

• Burn

  A term used in plate making to describe the amount of plate exposure time.

• Calendar Board

  A strong paperboard used for calendars and displays.

• Calendar Rolls

  A series of metal rolls at the end of a paper machine; when the paper is passed between these rolls it increases its smoothness and glossy surface.

• Caliper

  The measurement of thickness of paper expressed in thousandths of an inch or mils.

• Cameo

  A dull coated paper, which is particularly useful in reproducing halftones and engravings.

• Camera Ready

  A term given to any copy, artwork etc., that is prepared for photographic reproduction.

• Canvas Board

  A paperboard with a surface of simulated canvas, used for painting.

• Cap Line

  An imaginary horizontal line running across the tops of capital letters.

• Caps & Lower Case

  Instructions in the typesetting process that indicate the use of a capital letter to start a sentence and the rest of the letters in lower case.

• Caps & Small Caps

  Two sizes of capital letters made in one size of type.

• Cartridge

  A rough finished paper used for wrapping.

• Case

  The stiff covers of a hardbound book.

• Case Binding

  Books bound using hard board (case) covers.

• Cast Coated

  A paper that is coated and then pressure dried using a polished roller which imparts an enamel like hard gloss finish.

• Chrome Green

  The resulting ink pigment attained from the mixture of chrome yellow and iron blue.

• Chrome Yellow

  A lead chromate yellow ink pigment.

• Circular Screen

  A screen that utilizes a concentric circle pattern as opposed to dots used for halftones and to allow the platemaker to set exact screen angles.

• Coarse Screen

  Halftone screens commonly used in newsprint; up to 85 lines per inch.

• Coated (Paper)

  Paper coated with clay, white pigments and a binder. Better for printing because there is less picking.

• Coated Art Paper

  Printing papers used for printing projects that require a special treatment of detail and shading.

• Coated Stock

  Any paper that has a mineral coating applied after the paper is made, giving the paper a smoother finish.

• Cold Color

  Any color that moves toward the blue side in the color spectrum.

• Collate

  To gather sheets or signatures together in their correct order. (see Gather)

• Collating Marks

  Black step-marks printed on the back of folded sheets, to facilitate collating and checking of the sequence of book signatures.

• Collating Marks

  Black step-marks printed on the back of folded sheets, to facilitate collating and checking of the sequence of book signatures.

• Color Bars

  This term refers to a color test strip, which is printed on the waste portion of a press sheet. It is a standardized (GATF-Graphic Arts Technical Foundation) process which allows a pressman to determine the quality of the printed material relative to ink density, registration, and dot gain. It also includes the Star Target, which is a similar system designed to detect inking problems.

• Color Separating

  The processes of separating the primary color components for printing.

• Color Strength

  A term referring to the relative amount of pigmentation in an ink.

• Color Transparency

  Transparent film containing a positive photographic color image.

• Column Gutter

  Space between two or more columns of type on one page.

• Commercial Register

  Color registration measured within plus or minus one row of dots.

• Composition

  The assembly of characters into words, lines and paragraphs of text or body matter for reproduction by printing.

• Condensed Type

  A narrow, elongated type face.

• Contact Print

  A print made from contact of a sensitive surface to a negative or positive photograph.

• Contact Screen

  A halftone screen made on film of graded density, and used in a vacuum contact with the film.

• Continuous Tone

  Image made of non-discernable picture elements which give appearance of continuous spectrum of grey values or tones.

• Contrast

  The degree of tonal separation or gradation in the range from black to white.

• Copy

  Refers to any typewritten material, art, photos etc., to be used for the printing process.

• Copyboard

  A board upon which the copy is pasted for the purpose of photographing.

• Corner Marks

  Marks on a final printed sheet that indicate the trim lines or register indicators.

• Cover

  A term describing a general type of papers used for the covers of books, pamphlets etc.

• Cracking

  When printed pieces are folded there is a tendency for the ink or toner to "crack" on the fold line and expose the paper underneath. Cracking occurs more often on coated stocks and although scoring a piece can alleviate this problem, avoid heavy coverage in the areas where the folds will be.

• Creep

  When the rubber blanket on a cylinder moves forward due to contact with the plate or paper. Result of added thickness of folded sheets being behind one another in a folded signature. Outer edges of sheets creep away from back most fold as more folded sheets are inserted inside the middle.

• Crop

  To eliminate a portion of the art or copy as indicated by crop marks.

• Crop Mark

  Markings at edges of original or on guide sheet to indicate the area desired in reproduction with negative or plate trimmed (cropped) at the markings.

• Cross-over

  Elements that cross page boundaries and land on two consecutive pages (usually rules).

• Crossmarks

  Marks of fine lines, which intersect to indicate accurate alignment of art elements.

• Crossover

  A term used to describe the effect of ink from an image, rule or line art on one printed page, which carries over to another page of a bound work.

• Curl

  Not lying flat and tending to form into cylindrical or wavy shapes. A term to describe the differences of either side of a sheet relative to coatings, absorbency etc.; the concave side is the curl side.

• Cutter

  Machine for accurately cutting stacks of paper to desired dimensions...can also be used to crease. Also trims out final bound books' top size (soft cover).

• Cutting Die

  Sharp edged device, usually made of steel, to cut paper, cardboard, etc., on a printing press.

• Cyan

  A shade of blue used in the four-color process; it reflects blue and green and absorbs red.

• Delete

  An instruction given to remove an element from a layout.

• Demy

  A term that describes a standard sized printing paper measuring 17.5 x 22.5 in.

• Densitometer

  An optical device used by printers and photographers to measure and control the density of color.

• Density

  The degree of tone, weight of darkness or color within a photo or reproduction; measurable by the densitometer. Reference, densitometer.

• Density

  The lay of paper fibers relative to tightness or looseness which affects the bulk, the absorbency and the finish of the paper.

• Descender

  A term that describes that portion of lower case letters which extends below the main body of the letter, as in "p".

• Die

  Design, letters or shapes, cut into metal (mostly brass) for stamping book covers or embossing. An engraved stamp used for impressing an image or design.

• Die Cutting

  A method of using sharp steel ruled stamps or rollers to cut various shapes i.e. labels, boxes, image shapes, either post press or in line. The process of cutting paper in a shape or design by the use of a wooden die or block in which are positioned steel rules in the shape of the desired pattern.

• Die Stamping

  An intaglio process for printing from images engraved into copper or steel plates.

• Digital Proof

  Color separation data is digitally stored and then exposed to color photographic paper creating a picture of the final product before it is actually printed.

• Display Type

  Any type that stands out from the rest of the type on a page which attracts attention of the reader.

• Dog Ear

  Occurs when you fold into a fold (such as a letter fold). At the side of one of the creases you get an indentation. It may look like a small inverted triangle.

• Dot

  The smallest individual element of a halftone.

• Dot Gain

  Darkening of halftone image due to ink absorption in paper causing halftone dots to enlarge. Terms to describe the occurrence whereby dots are printing larger than they should.

• Draw-down

  A method used by ink makers to determine the color, quality and tone of ink. It entails the drawing of a spatula over a drop of ink, spreading it flat over the paper.

• Drier

  A term that describes any additives to ink which encourages the drying process.

• Drill

  The actual drilling of holes into paper for ring or comb binding.

• Drop Folio

  Page number printed at foot of page.

• Drop Shadow

  A shadow image placed strategically behind an image to create the affect of the image lifting off the page.

• Dry Mount

  Pasting with heat sensitive adhesives.

• Dull Finish

  Any matte finished paper.

• Dummy

  A term used to describe the preliminary assemblage of copy and art elements to be reproduced in the desired finished product; also called a comp.

• Duotone

  Color reproduction from monochrome original. Keyplate usually printed in dark color for detail, second plate printed in light flat tints. A two-color halftone reproduction generated from a one-color photo.

• Duplex Paper

  Paper which has a different color or finish on each side.

• Dutch

  Any deckle edged paper, originally produced in the Netherlands. Reference, deckle edge

• Dye-Based Ink

  Any ink that acquires its color by the use of aniline pigments or dyes. Reference, aniline

• Eggshell Finish

  The finish of paper surface that resembles an eggshell achieved by omitting the calendar process. Reference, calendar rolls.

• Electronic Composition

  The assembly of characters into words, lines and paragraphs of text or body matter with graphic elements in page layout form in digital format for reproduction by printing.

• Electronic Proof

  A process of generating a prepress proof in which paper is electronically exposed to the color separation negatives; the paper is passed through the electrically charged pigmented toners, which adhere electrostatically, resulting in the finished proof.

• Em

  A unit of measurement equaling 12 points or 4.5mm.

• Embossed

  A method of paper finishing whereby a pattern is pressed into the paper when it is dry.

• Embossing

  To raise in relief a design or letters already printed on card stock or heavy paper by an uninked block or die. In rubber and plastic plate making the process is usually done by heat.

• Emulsion

  A light sensitive substance used as a coating for film; made from a silver halide compound. This side should face the lens when the film is exposed.

• Enamel

  A term that describes a glossy coating on paper.

• Engraving

  A printing process whereby images such as copy or art are etched onto a plate. When ink is applied, these etched areas act as small wells to hold the ink; paper is forced against this die and the ink is lifted out of the etched areas creating raised images on the paper.

• Estimate

  The form used by the printer to calculate the project for the print buyer. This form contains the basic parameters of the project including size, quantity, colors, bleeds, photos etc.

• Estimator

  One who computes or approximates the cost of work to be done on which quotation may be based.

• Etch

  The process of producing an image on a plate by the use of acid.

• Even Smalls

  The use of smaller sized capitals at the beginning of a sentence without the use of larger sized caps.

• Expanded Type

  Type with width greater than normal producing a rectangular effect.

• Exposure

  That stage of the photographic process where the image is produced on the light sensitive coating.

• F&G

  A term in the binding process referring to folding and gathering.

• Fan Fold

  Paper folding that emulates an accordion or fan, the folds being alternating and parallel.

• Felt Finish

  The smoother side of paper, usually a soft weave pattern used for book papers.

• Filling In

  A fault in printing where the ink fills in the fine line or halftone dot areas.

• Film Coat

  Also called wash coat; any thinly coated paper stock.

• Finish

  The surface quality of paper.

• Finish (Paper)

  Dull - (low gloss) also matte or matte gloss.

• Fit

  The registration of items within a given page.

• Fluid Ink

  Also called liquid ink; ink with a low viscosity.

• Flush Cover

  A bound book or booklet etc. having the cover trimmed to the same size as the text.

• Foils

  Papers that have a surface resembling metal.

• Fold Marks

  Markings at top edges that show where folds should occur.

• Folder

  Machine used to fold signatures down into sections.

• Folio or Page Number

  Number of page at top or bottom either centered, flushed left or flushed right often with running headline.

• Font

  The characters which make up a complete typeface and size.

• Forwarding

  In Binding, the process between folding sheets and casing in, such as rounding and backing, putting on headbands, reinforcing backs, etc.

• French Fold(er)

  Folder with printing on one side so that when folded once in each direction, the printing on outside of the folds.

• Fringe

  A halo that appears around halftone dots.

• Fuzz

  A term for the fibers that project from the paper surface.

• Gang

  Group of frames or impositions in the same forme of different jobs arranged and positioned to be printed together.

• Ganging

  The bundling of two or more different printing projects on the same sheet of paper.

• Gathering

  Assembling sheets of paper and signatures into their proper sequence; collating.

• Ghosting

  Image which appears as a lighter area on a subsequent print due to local blanket depressions from previous image areas on a letterpress rotary machine as well as on an offset press.

• Gigo

  Garbage in, garbage out.

• Gilding

  Sticking on gold leaf to edges of books with a liquid agent and made permanent with burnishing tools.

• Gloss Ink

  Quick drying oil based inks with low penetration qualities, used on coated stock.

• Goldenrod

  An orange colored paper with gridlines, used to assemble materials for exposure for platemaking.

• Graduated Screen

  An area of image where halftone dots range continuously from one density to another.

• Grain

  Direction of fibers in a sheet of paper governing paper properties such as increased size changes with relative humidity, across the grain, and better folding properties along the grain.

• Grained Paper

  A paper embossed to resemble various textures, such as leather, alligator, wood, etc.

• Gravure

  An intaglio or recessed printing process. The recessed areas are like wells that form the image as paper passes through.

• Gripper

  A series of metal fingers that hold each sheet of paper as it passes through the various stages of the printing process.

• Gripper Edge

  The grippers of the printing press move the paper through the press by holding onto the leading edge of the sheet; this edge is the gripper edge.

• Gutter

  Space between pages in the printing frame of a book, or inside margin towards the back or binding edge. The blank space or margin between the type page and the binding of a book.

• Hairline register

  Printing registration that lies within the range of plus or minus one half row of dots. It is the thinnest of the standard printers' rules.

• Halftone

  Tone graduated image composed of varying sized dots or lines, with equidistant centers.

• Halftone Screen

  A sheet of film or glass containing ruled right-angled lines, used to translate the full tone of a photo to the halftone dot image required for printing.

• Hard Dot

  The effect in a photograph where a dot has such a small degree of halation that the dot shows quite sharp.

• Head Margin

  That space which lies between the top of the printed copy and the trimmed edge.

• Hickies

  Imperfections in presswork due to dirt on press, trapping errors, etc.

• High Bulk Paper

  Paper stock that is comparatively thick in relation to its basis weight.

• Highlight Dot

  The highest density of a halftone image.

• Highlights

  The lightest tones of a photo, printed halftone or illustration. In the finished halftone, these highlights are represented by the finest dots.

• House Sheet

  This is a term that refers to a paper that a printer keeps on hand in his shop.

• IBC

  Inside back cover.

• IFC

  Inside front cover.

• Image Area

  That portion of the printing plate that carries the ink and prints on paper.

• Image Setter

  High resolution, large format device for producing film from electronically generated page layouts.

• Imposition

  Arrangement of pages so that they print correctly on a press sheet, and the pages are in proper order when the sheets are folded.

• Impression

  Product resulting from one cycle of printing machine. The pressure of the image carrier, whether it be the type, plate or blanket, when it contacts the paper.

• Index Bristol

  A relatively thick paper stock; basis size---25 1/2 x 30 1/2.

• Indicia

  Markings pre-printed on mailing envelopes to replace the stamp.

• Industrial Papers

  A term used to denote papers such as janitorial, sanitary or heavy packing papers.

• Inserts

  Extra printed pages inserted loosely into printed pieces.

• Interleaves

  Extra blank pages inserted loosely into book after printing.

• Iridescent Paper

  A coated stock finished in mother-of-pearl.

• Italic

  Text that is used to denote emphasis by slanting the type body forward.

• Jacket

  The paper cover sometimes called the "dust cover" of a hardbound book.

• Job Number

  A number assigned to a printing project used for record keeping and job tracking. Also used to retrieve old jobs for reprints or reworking by customer.

• Jog

  To vibrate a stack of finished pages so that they are tightly aligned for final trimming.

• Jogger

  Vibrating, sloping platform that evens up the edges of stacks of paper.

• Kerning

  The narrowing of space between two letters so that they become closer and take up less space on the page.

• Keyline

  Lines that are drawn on artwork that indicate the exact placement, shape and size of elements including halftones, illustrations etc.

• Lacquer

  A clear gloss coating applied to printed material for strength, appearance and protection.

• Laid Finish

  A parallel lined paper that has a handmade look.

• Lay Edge

  Edge of a sheet of paper being fed into a printing press.

• Layout

  A rendition that shows the placement of all the elements, roughs, thumbnails etc., of the final printed piece before it goes to print.

• Leaders

  The dots or dashes used in type to guide the eye from one set of type to the next.

• Leading

  Space between lines of type; the distance in points between one baseline and the next.

• Leaf

  One of a number of folds (each containing two pages) which comprises a book or manuscript.

• Leaf Stamping

  A metal die, either (flat, or embossed), created from the image or copy, which is then heated to a specific temperature which allows the transfer of a film of pigmented polyester to the paper.

• Letterpress

  Printing that utilizes inked raised surfaces to create the image.

• Letterspacing

  The addition of space between typeset letters.

• Line Copy

  Any copy that can be reproduced without the use of halftone screens.

• Linen

  A paper that emulates the look and texture of linen cloth.

• Lithography

  The process of printing that utilizes flat inked surfaces to create the printed images.

• Logotype

  A personalized type or design symbol for a company or product.

• M weight

  The actual weight of 1000 sheets of any given size of paper.

• Machine Coated

  Paper that has had a coating applied to either one or two of its sides during the papermaking process.

• Machine Direction

  An alternate term for grain direction.

• Machine Finish

  A paper finish that results from the interaction of the paper with the Fourdrinier process as opposed to post machine embossing. Reference, Fourdrinier

• Magnetic Black

  Black pigments containing black iron oxides, used for magnetic ink character recognition.

• Make Rready

  Process of adjusting final plate on the press to fine tune or modify plate surface.

• Margin

  Imprinted space around edge of page.

• Mark-up

  To write up instructions, as on a dummy.

• Match Print

  Photographic proof made from all color flats and form composite proof showing color quality as well as accuracy, layout, and imposition before plates are made.

• Matte Finish

  A coated paper finish that goes through minimal calendaring. Reference, calendaring.

• Measure

  The width of type as measured in picas. Reference, picas.

• Mechanical

  A term used to describe finished artwork that is camera ready for reproduction, including all type, photos, illustrations etc.

• Metropolitan Service Area

  A group of ZIP codes usually in close proximity defining a large metropolitan area (e.g. New York City or Los Angeles).

• Midtone Dot

  Commonly taken as the area between highlight and shadow area of a subject's face in halftone image.

• Moire

  An undesirable halftone pattern produced by the incorrect angles of overprinting halftone screens.

• Mottle

  A term used to describe spotty or uneven ink absorption.

• Natural

  A term to describe papers that have a color similar to that of wood; also called cream, off-white or ivory.

• Negative

  Film that contains the same images as the original print, except that all colors and shades are reversed. Reference, positive.

• Newsprint

  A light, low cost groundwood paper made especially for newspapers. Reference, groundwood.

• Nominal Weight

  When the basis weight of paper differs from the actual weight, the term nominal weight is used.

• OBC

  Outside back cover.

• OFC

  Outside front cover.

• Offset

  The most commonly used printing method, whereby the printed material does not receive the ink directly from the printing plate but from an intermediary cylinder called a blanket which receives the ink from the plate and transfers it to the paper.

• Offset Paper

  A term for uncoated book paper.

• Onionskin

  A light bond paper used for typing and used with carbon paper because of its thinness.

• Opacity

  Quality of papers that defines its opaqueness or ability to prevent two-sided printing from showing through.

• Opaque

  A quality of paper that allows relatively little light to pass through.

• Over Run

  Surplus of copies printed.

• Overhang Cover

  A cover of a book that extends over the trimmed signatures it contains.

• Overlay

  A transparent sheet placed over artwork, in register with the work it covers; this is used to call out other color components of the work, instructions or corrections.

• Overlay Proof

  A process of proof making whereby the color separations are individually exposed to light sensitive film. This film is then set in registration with a piece of white paper in the background.

• Overprinting

  Any printing that is done on an area that has already been printed.

• Overset

  Type that is set in excess of the allotted space.

• Page

  One side of a leaf.

• Page Makeup

  The assemblage of all the necessary elements required to complete a page.

• Page Proofs

  Proofs made up from pages.

• Paperboard

  Any paper with a thickness (caliper) of 12 points (.3mm) or more.

• Parchment

  A hard finished paper that emulates animal skin; used for documents, such as awards, that require writing by hand.

• Parent Sheet

  A sheet that is larger than the cut stock of the same paper.

• Paste-up

  Preparation of positive materials into a layout for photographing to film negatives.

• Perf Marks

  Markings usually dotted lines at edges showing where perforations should occur.

• Perfect

  A term used to describe the binding process where the signatures of a book are held together by a flexible adhesive.

• Perfect Binding

  Binding process where backs of sections are cut off, roughened and glued together, and rung in a cover.

• Perfecting

  Printing both sides of the paper (or other material) on the same pass through the printing machine.

• Perfecting Press

  A printing press that prints on both sides of the page in a single pass.

• Perforating

  Punching small holes or slits in a sheet of paper or cardboard to facilitate tearing along a desired line.

• Pica

  Standard of measurement, 1/6 inch. 1 pica = 12 points 72 points = 1 inch

• Pinholing

  Failure of printed ink to form a completely continuous film, visible in the form of small holes in the printed areas.

• Plastic Comb

  A method of binding books whereby holes are drilled on the side closest the spine, and a plastic grasping device is inserted to hold the pages together.

• Plate

  Reproduction of type or cuts in metal, plastic, rubber, or other material, to form a plate bearing a relief, planographic or intaglio printing surface.

• PMT

  Photomechanical transfer.

• Point

  A measurement unit equal to 1/72 of an inch. 12 points to a pica, 72 points to an inch.

• Positive

  Film that contains an image with the same tonal values as the original; opposite of a negative.

• Ppi

  Pixels per inch.

• Premium

  Any paper that is considered better than #1 by its manufacturer.

• Press-Proof

  Actual press sheet to show image, tone values and colors as well as imposition of frame or press-plate.

• Primary Colors

  In printing the four primary colors are cyan (blue), magenta (red), yellow and black.

• Printability

  The quality of papers to show reproduced printed images.

• Printers Pairs

  Two consecutive pages as they appear on a flat or signature.

• Process Inks

  Printing inks, usually in sets of four colors. The most frequent combination is yellow, magenta, cyan, and black, which are printed, one over another in that order, to obtain a colored print with the desired hues, whites, blacks, and grays.

• Process Printing

  Printing from two or more half tones to produce intermediate colors and shades.

• Proof

  Impression from composed type or blocks, taken for checking and correction, from a lithographic plate to check accuracy of layout, type matter, tone and color reproduction.

• Rag paper

  Papers with a complete or partial content of cotton fibers.

• Ragged Left

  The term given to right-justified type that is uneven on the left.

• Ragged Right

  The term given to left-justified type that is uneven on the right.

• Readers Pairs

  Two consecutive pages as they appear in printed piece.

• Ream

  500 sheets of paper.

• Recto

  The odd numbered pages (right hand side) of books.

• Reel

  The master roll of paper as it comes off the papermaking machine. It is in its original width and is then cut into smaller rolls.

• Register

  The arrangement of two or more images in exact alignment with each other.

• Register Marks

  Any crossmarks or other symbols used on layout to assure proper registration.

• Right Angle Fold

  A term that denotes folds that are 90 degrees to each other.

• Run-Around

  A term given to copy that accommodates the lines of a picture or other image or copy.

• Runability

  A term used to describe how well a paper runs on a printing press.

• Running Head

  A title at the top of a page that appears on all pages of a book or chapter of a book.

• Saddle Stitching

  Stitching where the wire staples pass through the spine from the outside and are clinched in the center. Only used with folded sections, either single sections or two or more sections inset to form a single section.

• Satin Finish

  A smooth delicately embossed finished paper with sheen.

• Scaling

  The enlargement or reduction of an image or copy to fit a specific area.

• Score

  Impressions or cuts in flat material to facilitate bending or tearing.

• Screen Angles

  The placement of halftone screens to avoid unwanted moire patterns. Frequently used angles are black 45deg, magenta 75deg, yellow 90deg, and cyan 105deg.

• Screen Ruling

  A measurement equaling the number of lines or dots per inch on a halftone screen.

• Screened Print

  A photo print made by using a halftone negative; also called a velox.

• Self Cover

  A cover made out of the same paper stock as the internal sheets.

• Shadow Dot

  The lowest density of a halftone image.

• Sharpen

  To decrease the dot size of the halftone which in turn decreases the color strength.

• Sheetwise

  The printing of two different images on two different sides of a sheet of paper by turning the page over after the first side is printed and using the same gripper and side guides.

• Show Through

  A problem that occurs when the printing on one side of a sheet is seen from the other side.

• Side Guide

  The guides on the sides of the sheet fed press that position the sheet sideways as the paper is led towards the front guides.

• Side Stitching

  Stitching where the wire staples pass through the pile of sections or leaves gathered upon each other and are clinched on the underside.

• Signature (Section)

  Printed sheet (or its flat) that consists of a number of pages of a book, placed so that they will fold and bind together as a section of a book. The printed sheet after folding.

• Smoothness

  That quality of paper defined by its levelness which allows for pressure consistency in printing, assuring uniformity of print.

• Spine

  Back edge of a book.

• Spiral Bind

  A binding whereby a wire or plastic is spiraled through holes punched along the binding side.

• Spot Color

  Small area printed in a second color.

• Static Neutralizer

  A device on a printing press that minimizes the amount of static build up on paper as it passes through the press.

• Step And Repeat

  A process of generating multiple exposures by taking an image and stepping it according to a predetermined layout.

• Stet

  A proofreader's symbol that is usually written in the copy margin, that indicates that the copy, which was marked for correction, should be left as it was.

• Stock

  A term for unprinted paper or other material to be printed.

• Synthetic Papers

  Any petroleum based waterproof papers with a high tensile strength.

• Tack

  The adhesive quality of inks.

• Tag

  A dense, strong paper stock.

• Tensile Strength

  A paper's ability to withstand pressure.

• Text

  A high quality printing paper.

• Thermography

  A printing process whereby slow drying ink is applied to paper and while the ink is still wet, it 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.

• Tint

  A halftone screen that contains all the same sized dots.

• Transparent

  Inks that do not block out the colored inks that they print over, but instead blend with them to create intermediate colors.

• Trapping

  The process of printing wet ink over printed ink which may be wet or dry.

• Trim Marks

  Marks placed on the sheet to indicate where to cut the page.

• Two-sidedness

  The difference in feel and appearance of either side of a sheet of paper due to the papermaking process having a felt and wire side.

• Up

  A term used to describe how many similar sheets can be produced on a larger sheet; two up, four up, etc.

• Varnish

  A clear shiny ink used to add gloss to printed pieces. The primary component of the ink vehicle. Reference, vehicle.

• Vellum

  A finish of paper that is rough, bulky and has a degree of tooth.

• Velour Paper

  A term given to papers that are coated with an adhesive and then flock dusted.

• Velox

  A photographic print which is made from a negative.

• Verso

  A term given to the left-hand or even-numbered pages of a book.

• Vignette

  Fade to white or small decorative design or illustration. A photo or illustration etc., in which the tones fade gradually away until they blend with the surface they are printed on.

• Watermark

  A translucent logo that is embossed during the papermaking process while the paper slurry is on the dandy roll. Reference, dandy roll

• Web Press

  Cylinder printing machine in which the paper is fed from a continuous reel, as opposed to sheet fed.

• Wedding Paper

  A soft paper that is thick and holds up well under embossing.

• Widow

  A single word or two left at the end of a paragraph, or a part of a sentence ending a paragraph, which loops over to the next page and stands alone. Also, the last sentence of a paragraph which contains only one or two short words.

• Wire Stitching Or Stapling

  To fasten together sheets, signatures, or sections with wire staples. 3 methods... saddle stitching, side stitching, and stabbing.

• Wove

  A smooth paper made on finely textured wire that gives the paper a gentle patterned finish.

• Writing Paper

  Another name for bond paper.

• Xerographic Paper

  Papers made to reproduce well in copy machines and laser printers.