Glossary of Paper Terms

Glossary of Paper Terms


Abbreviation indicating that the paper has been guillotine trimmed on all four sides. Literal translation: trimmed four sides.
During binding, the cutting or adhering of tabs on the edges of pages.
The pulling power or separation force of ink causing picking or splitting of weak papers.
Tagged Image File Format (TIFF)
A file format for graphics suited for representing scanned images and other large bitmaps. TIFF is a neutral format designed for compatibility with all applications. TIFF was created specifically for storing grayscale images, and it is the standard format for scanned images such as photographs-now called TIFF/IT.
Tear Test
A test to determine the tearing resistance of paper.
TCF - Tottaly Chlorine Free
Includes both virgin and post-consumer fibers that are bleached without any chlorine containing compounds.
Tearing Strength
The ability of a paper to resist tearing when subjected to rigorous production demands of manufacturing, printing, binding and its conversion from flat sheets into envelopes, packaging materials, etc.
Tensile Strength
Tensile strength relates to the stress and strain to which paper is subjected in its many end use applications. It is defined as the maximum force required to break a paper strip of a given width under prescribed laboratory conditions. Tensile strength is usually defined as pounds-per-inch width of the testing strip, or as kilograms per 15-millimeter width. Tensile strength is measured in both the grain and cross-grain directions, however, it is always greater in the grain direction.
Text Paper
A general term applied to various grades of printing paper designed for deluxe printed booklets, programs, announcements and advertising. May be watermarked.
Letterpress printing in which a special ink, while still wet, is dusted with a retinous powder. Then the sheets are baked fusing the powder with the ink, giving it a raised effect.
Thermomechanical Pulp
Made by steaming wood chips prior to and during refining, producing a higher yield and stronger pulp than regular groundwood.
Measurement in thousandths of an inch.
Shading of an area in a form.
Tint Plate
Printing plate with customized surfaces to print solid colors or patterns, stipple line or dot arrangements in tints of inks. Tint blocks are also used to deepen colors in an illustration.
An all-over color tint on the press sheet in the nonimage area of the sheet, caused by ink pigment dissolving in the dampening solution.
Titanium Dioxide
Chemical substance used as loading or coating material to increase the whiteness and brightness of a sheet and contribute to its opacity.
Permissible degree of variation from a pre-set standard.
Characteristic of paper. A slightly rough paper which permits acceptance of ink readily.
Designates the felt side of a sheet of paper. The top side of a sheet is the side not against the wire during manufacture. (2) In paperboard, the top is the side that exhibits the best quality.
Tub sizing of paper which has previously been beater sized.
Ability to transmit light without being transparent.
Translucent Papers
Papers that will allow information to be seen through them but not totally clear like acetate; UV/ULTRA® II Translucent Papers.
Photographic positive mounted in a clear or transparent image.
Transparent Ink
A printing ink which does not conceal the color beneath. Process inks are transparent so that they will blend to form other colors.
The ability to print a wet ink film over previously printed ink. Dry trapping is printing wet ink on dry paper or over dry ink. Wet trapping is printing wet ink over previously printed wet ink.
Excess of the paper allowed a printed sheet for gripper and bleed.
Trim Margin
The margin of the open side, away from the bind; also called thumb, face or outside margin.
Trim Marks
In printing, marks placed on the copy to indicate the edge of the page where to cut or trim.
Trim Size
The final size of a printed piece after trimming.
Trimmed Size
The final size of a printed piece after all bleeds and folds have been cut off.
Machine equipped with a guillotine blade that can cut paper to the desired size.
Tub-Sized (surface-sized)
Sizing added to the surface of paper by passing a web through a tub or bath of sizing, removing the excess, and drying.
Head to foot printing.
Twin-Wire Machine
A paper machine with two wires instead of one producing paper with less two-sidedness.
Two-Sheet Detector
In printing presses, a device for stopping or tripping the press when more than one sheet attempts to feed into the grippers.
In paper, the property denoting difference in appearance and printability between its top (felt) and bottom (wire) sides.
Printing the same page or group of pages from two sets of plates, thereby producing two impressions of the same matter at one time.
Two-Up Binding
Printing and binding in such a way that two books are bound as one, then cut apart into separate books.
Type Face
A design of letters of the alphabet intended to be used in combination.

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