Paper

Paper

Printing paper and industry terms.

Industry: Printing & publishing

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Paper

Moisture content

Printing & publishing; Paper

Refers to the amount of moisture found in a sheet of paper. Average amount ranges from 5 to 8%. This figure varies from sheet to sheet since paper will emit or absorb moisture according to the ...

Nominal weight

Printing & publishing; Paper

Refers to the basis weight of the paper. Unless otherwise stipulated by the mill and customer, a tolerance of plus or minus 5% is allowed when calculating the nominal weight.

Unit

Printing & publishing; Paper

Refers to the combination of inking, plate and impression operations to print each color. A 4-color press has 4 printing units each with its own inking, plate and impression functions.

Deckle edge

Printing & publishing; Paper

Refers to the feathered edge on paper produced when fibres flow against the deckle or edge of the web. Deliberately produced for aesthetic purposes, a deckle edge is found especially on formal ...

Rag pulp

Printing & publishing; Paper

Pulp made by disintegrating new or old cotton or linen rags and cleaning and bleaching fibers.

Semi-chemical pulping

Printing & publishing; Paper

Pulp made using a combination of chemical and mechanical methods and usually used for corrugated mediums.

Perforate

Printing & publishing; Paper

Punching a series of holes or slits in a line in the paper, to weaken it so tearing will occur easily along that line. Also the making of slits in paper during folding, at the fold, to prevent ...