Creases form in substrate.



-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.



- 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.