- label paper -
Most label paper is coated on one side. Used for labels of various types.
- lacquer -
A solution in an organic solvent of a natural or synthetic resin. Used for coating paper to make it less pervious to grease and water, and to provide heat sealing properties, gloss, and aesthetic effects. The lacquer is mixed with a solvent and after application to the paper's surface, the solvent evaporates leaving the lacquer on the surface of the sheet to remain as a shiny and more or less continuous protective coating. (See coated).
- laid -
The finish imparted by a dandy roll which features wires parallel to its axis that impress the paper during manufacture to produce a permanent watermark. The wires which produce the laid effect are situated parallel on the dandy roll and are not interwoven with the traverse chain wires which encircle the dandy roll's circumference.
- laminated -
Paper that is developed by fusing one or more layers of paper together to the desired thickness and quality.
- laser -
The acronym for light amplification by stimulated emission of radiation. A laser is an intense light beam. For printing, it is capable of transmitting images from digital data.
- latex -
A water dispersion of high polymers from sources related to natural or synthetic rubber. Used in paper manufacturing for such purposes as a coating, adhesive and barrier.
- layout sheet -
Form with guidelines to assist designers.
- leader -
In composition for printing, row of dashes or dots to guide the eyes across the page.
- leather or leatherette paper -
Paper embossed with a grain suggesting leather.
- leaves -
Individual sheets of paper.
- ledger paper -
A strong paper, usually for accounting and records. It is similar to bond paper in its erasure and pen writing characteristics.
- lenox cut -
Method of continuously cutting paper involving steel disk slitters that trim the sides of the paper and rotating blades that trim the ends. This method eliminates dished reams and out-of-square corners sometimes associated with guillotine-cut reams of papers.
- letterpress printing -
Also known as relief typographic printing, letterpress printing employs the use of type or designs cast or engraved in relief (raised) on a variety of surfaces which can include metal, rubber, and wood. In letterpress printing the ink is applied to the raised printing surface. Non-printing areas or spaces are recessed. Impressions are made in various ways. On a platen press the impressions are made by pressure against a flat area of type or plate. Flat-bed cylinder press printing uses the pressure of a cylinder rolling across a flat area of type or plate to create the impression. A rotary web press uses a plate that has been stereotyped (molded into a curved form) which presses against another cylinder carrying the paper.
- letterset -
Process known both as "dry offset" and "indirect" letterpress. An intermediate blanket cylinder is used to transfer an image from a flexible one-piece shallow relief plate to paper.
- lightweight paper -
Paper manufactured in weights below the minimum basis weight considered standard for that grade.
- lignin -
A substance present in all woods which acts as a binder that holds the cellulose fibers together. It represents up to 30% of the wood content, and is largely removed by chemical treatment in the pulping process.
- likesidedness -
Noticeably similar side-to-side color and finish of a sheet of paper.
- line conversion -
By placing emphasis on the most important feature of the subject, original copy is reproduced in line as high-contrast image. Can be used in combination with other special effects.
- line halftone combination -
Printing plate comprising both line and halftone images.
- linear laid paper -
A watermarked sheet with lines to guide the user.
- linecasting -
Preparation of text copy in lines of justified and hyphenated type set by hot-metal typesetting machine.
- linen -
Cuttings and threads of linen cloth used in the paper industry for the manufacture of high quality rag content paper.
- linen finish -
Embossed paper or boards that have a surface resembling linen cloth.
- linerboard -
Used in the manufacture of corrugated and solid fiber shipping containers, linerboard is made predominantly on a Fourdrinier machine. It is used by the packaging industry as a facing material for containers.
- liners -
Outside layers of a combination board. Also paperboard used as an inner or outer facing in the manufacture of corrugated and solid fiberboard.
- lining paper -
Paper used as covering such as box lining. Usually non-fading, opaque, machine-finished paper.
- lithography -
Process of printing using a flat-surfaced plate, the image on which is transferred to a blanket then to paper. (See offset printing).
- localized watermark -
Achieved by arranging the design on the dandy roll to leave a watermark at the same position on each sheet after cutting.
- loft dried papers -
A form of air drying where paper is festooned on poles to dry without tension.
- long grain -
Paper made with the machine direction in the longest sheet dimension.
- longevity -
Degree of permanence.
- longfold -
To fold a sheet lengthwise in the direction of the grain. (See long grain, broad fold).
- loose perforation -
Easy to tear perforation.
- low finish -
Paper characterized by low light reflective properties. Dull. Opposite of high gloss finish. Low finished papers are without glaze or gloss.
- luminous paper -
Fluorescent, phosphorescent paper.
- luster -
Property of gloss and sheen.