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PULP AND PAPER DICTIONARY

This page contains definitions of the terms, words and phrase commonly used in pulp and papermaking, printing, converting and paper trading.

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UNION KRAFT            A packaging material comprising two layers of Kraft paper bonded together by means of a laminate that is resistant to the transmission of water in liquid or vapour form. E.g. bitumen or plastic.

UNBLEACHED           Any type of paper made from pulp that was not treated in any bleaching process.

UNFINISHED PAPER  Paper which comes directly from the paper machine and goes through no additional surface treatment before it is used.

UNGLAZED PAPER    Un-calendared paper.

UN-SIZED PAPER       A paper which has not been sized.

URBAN FOREST        A description of towns and cities which are the source of wastepaper as one of the raw materials used for paper making.

URBAN WOOD            Used pallets, wooden shipping crates and clean construction wood diverted from the waste stream and chipped for use in making particleboard and medium density board.

UV COATING               A very glossy, slick coating applied to the printed paper surface and dried on press with ultraviolet (UV) light. UV coating can cause slight variations in match colours, so consult an ink manufacturer or printer for best results.

UV INK                         An ink specially formulated to dry quickly with ultraviolet light while still on press. Fast UV drying eliminates the need to wait for the first side to dry before printing the second side.