Wire impressions

1. Reduce breast roll drainage by moving apron lip towards slice away from couch.
— if possible, alter curvature of the slice lip to carry the jet further down the forming fabric.
2. Reduce refining on excessively slow stock.
3. Graduate flat box vacuum and use all boxes.
4. If forming fabric is too slack, increase wire tension .
5. Raise headbox consistency to reduce amount of water in sheet.
6. Check position and alignment of forming board deflectors, drainage elements and flat boxes.
— readjust where necessary.
7. Raise position of dandy.
8. Reduce presser (lump breaker) roll loading.
9. Investigate possibility of a finer mesh forming fabric.
10. Sometimes related to depth of penetration of fibers into openings of forming fabric.
— excessive drainage in area of entry or early formation may cause fibers to stand on end and staple into wire or fabric.
11. Excessive drainage without sufficient turbulence may cause sheet sealing.
— this leads to higher flatbox vacuums that pull sheet into wire or forming fabric.
12. Maintain headbox near level required by theoretical jet-to-wire speed.
— use a low jet angle to minimize wire marking.