Clues and Knowhow: Office Paper

von Florian Rigotti (geb. Heise)

We get questions aplenty by our readers about problems they have with paper they use for printing. Paper jams, dusting, expensive misprints, complete failure, you name it.

Erschienen am 10. Oktober 2007 bei Druckerchannel.de, 13 Seite(n)

https://www.druckerchannel.de/artikel.php?ID=2069

Knowhow 4: How Paper is made

Paper machine: More than 100 meters long.

Paper manufacture nowadays is a mainly computer-controlled process. Men take correcting actions only in eliminating damages or in monitoring.

Paper production.

The simplified depicted process begins with

• Rebuild of wood and/or straw in very small particles. Cleaning of recovered paper with subsequent milling.
• In a Pulper all ingredients are blended.
• The liquid homogeneous pulp flows into the wire section, which is a moving, endless wire mesh. Here the fibres start to spread and accumulate into a thin sheet, while part of the water is draining off.
• Follows the press section, where a series of presses squeeze more water out of the sheet.
• In the drying section it passes around several heated cast-iron cylinders, until it is down to the desired humidity. Now can follow a surface refinement.
• In the calander, an ironing kind process, to smooth the surface of the paper while it passes between rotating metal rollers.
• The Paperroller rolls up the finished paper.