Saliida roganta iyo wasakhda kale ee saliidda ee ku hadhay dusha foornada, kuwaas oo ku samaysma dusha bireed ilaa heerar kala duwan marka la tirtiro, waxa loo yaqaan spots.
Sababaha ugu muhiimsan ee dhibcaha saliidda: saliid heer sare ah oo ku jira duubista aluminium, ama kala duwanaansho aan habboonayn oo saliid duuban; saliidda farsamaysan ee saliidda duubista ee aluminium; hab-raac aan habboonayn; excessive oil on the surface of the product during rolling; The slitting tension is too large, causing the aluminum foil roll to be too tight.
