Creases form in substrate.
Causes:
-Baggy substrate;
– Web guide not operating or properly set;
– Press out of alignment;
– Foreign matter on press rollers;
– Excessive web temperatures;
– Variations in substrate gauge.
Solutions:
– Draw out wrinkles by tapping rollers at web edge;
– Check and clean web guides. Set web guides and position cores so that web will unwind and rewind at equal distances from the shaft ends;
– Realign press, especialy rollers;
– Clean all rollers from build up of ink, tape or other sticking matter;
– Reduce web temperature;
– Replace with new substrate.
