Optical Character Recognition. Machine reading of printed characters.

In reference to paper, papers that are not regular or standard sizes, weights, finishes and colors.

Non-standard paper sizes.

Process of coating paper with a coater not part of the paper machine. It can be in the same or in a separate facility.

See out-of-square.

Off side sheets remaining after standard size sheets have been cut.

Generally refers to paper that is manufactured specifically for use on offset presses. It is characterized by good internal bonding, high surface strength, freedom from fuzz, pick-resistance and freedom from curl. This paper must be relatively impervious to water.

Indirect rotary press with plate cylinder, blanket cylinder and an impression cylinder.

Process of printing utilizing a lithographic plate on which the images or designs are ink receptive while the remainder of the plate is water receptive. Ink is transferred from the plate to a rubber blanket on the printing press and this rubber blanket transfers the image to the paper. It is sometimes referred to as offset lithography or photo-offset.

See machine coated.

Paper industry jargon referring to the fact that a paper machine or paper mill is operating.

Output device on computer using a print element that is constantly moving: a drum or chain.

In forms, captions that use lines instead of boxes.

Paper coated on one side only. (See label paper).

A lightweight paper, coated one side with carbon, for use in business forms.

Screen that breaks solids and tones into a series of lines rather than dots.

Lightweight paper. Basic size in 17" x 22"/500 sheets. Substance weights 7 to 10 lbs. Usually made from cotton fibers in qualities from 100% cotton fiber to 25%.

A device that determines a paper's opacity or "show-through" quality.

The property of a sheet which prevents print areas from showing through the paper to the other side. For the explanation of the test to determine the opacity of paper see Chapter 6.

That property of paper which prevents "show-through" of printing, or other marks; on or in contact with the backside. In photoengraving, to paint-out areas on the negative that must not appear on the plate.

An ink that conceals all color beneath it.

Blanket-to-steel press.

Dimension of sheet of paper at right angles to the grain direction. Also the dimension at right angles to the stub of a form.

Optical brighteners or fluorescent dyes are extensively used to make high, bright blue-white papers. They absorb invisible ultraviolet light and convert it to visible light falling into the blue to violet portion of the spectrum, which is then reflected back to our eyes.

Input device on a computer which converts characters or marks to machine codes. Character readers, Bar Code Reader or Mark Reader.

Sensitive to all colors except red.

Rolls of paper to be suitable for web offset printing must be perfectly round. Out-of-round rolls can contribute to uneven feeding tension.

Paper that has been trimmed improperly thus causing the corners to be less or more than 90 degrees. This leads to difficulty during the printing process and often results in misregister of the printed piece. Also called off-square.

Strong board that is able to resist weather conditions and water. During manufacture it is impregnated with waterproofing material. It is primarily used for outdoor displays and posters, and is available in caliper thickness ranging from 0.036 to 0.120 of an inch.

Window envelope.

Samples of the papers manufactured to order. They are kept in a file or sent to customers upon request.

Printing an area which has been previously printed.

Quantity of paper that is manufactured beyond the quantity specified.

Like chromalin proofs, these also are made chemically. They are similar to transfer keys and are created on the identical substrate, acetate. Instead of dots coexisting on the same sheet of acetate, each color--magenta (red), cyan (blue), yellow and black--is represented on a different acetate overlay. Since this acetate is virtually transparent, the combination of four overlays will make a full-color image.

Paper manufactured a little larger to permit trimming to the desired size. Also refers to paper larger than that ordered.