Formation, cloudy and wild

1. Fiber length index too high.
— increase refining.
— change furnish to reduce percent of long fibered stock.
2. Increase refining until drainage on former is correct.
3. Consistency in headbox too high resulting in flocculation.
— increase water in headbox, if possible and raise slice to maintain required head.
— slow down machine if wet line is too far down forming fabric, or free-up stock.
— may need to check and adjust polymer or alum levels to avoid flocculation.
4. Lower headbox deflector and/or secondary slice to eliminate flocculation due to low headbox velocities.
— when speed is reduced significantly, may have to move shower locations.
5. Slice opening and head not in keeping with wire speed.
— check headbox level.
— observe delivery onto forming fabric and raise or lower head, as required.
— ensure that headbox level controller is working properly.
6. Excessive drainage at breast roll.
— check relative position of breast roll center-line and apron lip.
— check relative positions of slice and slice lip.
— lower slice and raise slice lip to reduce breast roll drainage.
7. Move apron towards couch to reduce drainage.
— if apron is stationary, move slice away from couch.
8. For a vibrating or whipping table roll, lower defective roll and notify maintenance.
9. Adjust shake stroke and/or speed.
10. Check for correct tension on forming fabric.
— adjust as required.
11. Check operation of the dandy.
12. Sheet set too quickly on heavier grades.
— check foil angles and positions to prevent sealing of lower fiber layer on wire.
— ensure proper micro-turbulence on table.
— use sonic rolls, serrated slice, formation showers, etc.
13. Check and adjust stock temperature.
14. Eliminate any foam in stock.
15. Check couch loading and regulator to assure correct pressure.
16. Check for rolling stock at press nip.
— reduce water in sheet at press section.

17. Check stock approach system and correct if necessary.
18. Ensure that broke is well disintegrated.
— broke spots are apparent from large specks of unrefined paper in web.
19. Ensure that operation is within forming capability of equipment.
See Formation improvement.