Epo yiyi ati awọn abawọn epo miiran ti o ku lori oju ti bankanje naa, eyi ti o ti wa ni akoso lori bankanje dada si orisirisi awọn iwọn lẹhin annealing, ti a npe ni epo to muna.
Awọn idi akọkọ fun awọn aaye epo: ga ìyí ti epo ni aluminiomu bankanje sẹsẹ, tabi sedede distillation ibiti o ti sẹsẹ epo; darí epo infiltration ni aluminiomu bankanje sẹsẹ epo; aibojumu annealing ilana; 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.
