Delamination

 
Trouble
Cause
Solution

On a blanket-to-blanket type web offset press, fluttering of paper when leaving nips of blankets causes misregister, doubling and ghost.

 

INK

Difficulty in release from the blanket.(Due to high tack value or viscosity.)



Reduce the tack value by adding 3-5% more compound.

Use low tack ink.

 

 

PAPER

Excessive smoothness and ink absorbency of paper make a difficulty in release.

Replacement of paper.

  PRESS

Imbalance of the printed space on each side.

Imbalance of the distribution of dampening water on both sides of paper.

Shortage of tension.



Reduce the amount of ink as much as possible.

Check and adjust the distribution of dampening water on the printing plate.(the amount, the ups and downs.)

Adjust the tension.

Change the types of blanket.

Slow down the press speed.

 

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