A starred paper roll is defined as a reel that is not uniformly wound. The outer diameter of the roll was wound more tightly than the inner core. This results in depressions at various points in the reel. It a non-uniform wind.
How it happens.
From time to time the paper mill must make a splice in a reel due to paper breaks or other running issues. Or the operator simply makes an adjustment in tension. When the paper machine begins again, the tension can be inconsistent. This will result in the inside layers buckling underneath the pressure of the lower layers.
The problem is exacerbated by handling. Clamp trucks or storage methods will cause more starring in the wind of the roll.
This is distinguishable from the paper defect considered an out of round roll. The difference is that the problem occurs around the entire diameter of the roll. This is now a tension issue from the mill and is considered a starred reel.
Can these rolls be used?
Yes, but expect variations in tension and web wander.
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