• <progress id="47fdn"><track id="47fdn"></track></progress>

    <rp id="47fdn"><object id="47fdn"><input id="47fdn"></input></object></rp>

    Perforating

    In binding and finishing, any operation which punches tiny slits or holes in a sheet of paper or other substrate. Perforating is performed either on press or off press using perforating dies. Materials are perforated either to allow a portion to be easily removed (such as an order form or coupon), or to allow air to escape from folded signatures, which helps prevent wrinkling. The amount of paper between the perforations—called a tie—can be adjusted. Perforating may also be effected directly on an offset press by means of a perforating rule.

    All text and images are licensed under a Creative Commons License
    permitting sharing and adaptation with attribution. (See Copyrights for details.)

    PrintWiki – the Free Encyclopedia of Print
    About    Hosted by WhatTheyThink


    可打现金的麻将平台