marque de couture

OBS: Elle est causée par un égouttage différent au niveau de la couture des toiles ou des feutres des machines à papier.

OBS: It usually appears as a light streak or adjacent light and dark streaks when viewed by transmitted light; width of streak is usually 25 mm (1"") or less. Can give a similarly shaped defect in a print. Caused by non-uniform drainage through a wire or dryer felt seam. The distance from one defect to the next is a clue to the origin of the mark.