Tips

Cutting

  • To avoid runnability problems during printing, it is necessary to respect certain rules when cutting the initial format to the format of the run on the press.
  • RESPECT THE DIRECTION OF THE FIBRES

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  • Printing: The fibre direction of the paper should be perpendicular to the printing direction

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Printing

Check the direction of the paper before printing in order to print on the coated side.

Recommended times for conditioning unopened pallets

Pallet volume Temperature difference between pallet and pressroom
  5°C 7.5°C 10°C 15°C 20°C 25°C 30°C 35°C
0.2m3 4h 7h 9h 15h 21h 29h 41h 62h
0.4m3 7h 12h 17h 26h 36h 41h 64h 92h
0.6m3 9h 15h 20h 31h 42h 55h 76h 106h
1m3 12h 18h 23h 33h 46h 63h 94h 115h
2m3 13h 19h 24h 35h 49h 66h 90h 123h

High humidity and its effects on paper

Fibres absorb surplus humidity in the atmosphere and dilate contrary to the machine direction. This causes the paper to undulate. To avoid this problem, make sure the paper remains in its packaging until used and then protect it at each stage of production.

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Relative atmospheric humidity 75%
Relative paper humidity 50%

Low humidity and its effects on paper

In an excessively dry atmosphere, existing humidity in the paper evaporates and the fibres contract contrary to the machine direction. This creates a hollowing effect, especially in the winter;

tl_files/themes/maineoneface/schemas/humidity2.gifRelative atmospheric humidity 35%
Relative paper humidity 50%

This information is supplied in good faith; it is only intended as a general guide and Arjowiggins shall not be held liable for loss of damage arising from actions based on these tips.