The dark face of 8021 aluminum foil appears uneven rolling. What causes this and how to solve it?
Seeing clearly the uneven rolling in the dark face.
The uneven rolling that you have mentioned is scratch or silvering. If it is scrath, this scrath may ba caused during the rolling process or the oil surface is scratched during the process of oil cleaning cut (finishing mill is single open book); Double open book in the process of finishing mill may also have a very small probability to cause rubbing scratch. If it is uneven rolling, it may be caused during the rolling process or the oil level exists silvering in the process of oiling(finishing mill is single open book). Seeing if it is cyclical since silvering is cyclical
