Oleum volubile et maculae aliae oleum in superficie claui remanentes, quae in superficie folii ad gradus varios post furnum formata sunt, dicuntur oleum maculae.
Pelagus causas oleum maculae: altus gradus olei in aluminium ffoyle volubilem, vel non proprium distillationis range of volvens oleum; mechanica oleum infiltration in aluminium ffoyle volvens oleum; improprium furnum processum; 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.
