破壞(huai)了電(dian)化鋁(lv)表(biao)面(mian)(mian)光澤(ze)性，圖(tu)文輪廓發(fa)虛：需要覆(fu)膜加(jia)工的燙金(jin)，因擔心金(jin)箔(bo)容易擦(ca)落(luo)而(er)先(xian)燙印再覆(fu)膜。這易造(zao)(zao)成(cheng)(cheng)薄膜（尤(you)其是(shi)亞光膜）會(hui)破壞(huai)電(dian)化鋁(lv)的表(biao)面(mian)(mian)光澤(ze)性，也不宜采用水(shui)溶性膠水(shui)覆(fu)膜，否則會(hui)造(zao)(zao)成(cheng)(cheng)電(dian)化鋁(lv)表(biao)面(mian)(mian)發(fa)黑(hei)，同時(shi)極易造(zao)(zao)成(cheng)(cheng)金(jin)粉粘(zhan)在圖(tu)文邊緣造(zao)(zao)成(cheng)(cheng)發(fa)虛現象(xiang)。燙金(jin)后因壓力(li)作用而(er)凹陷，再加(jia)上膠水(shui)不易滲透電(dian)化鋁(lv)表(biao)層，易造(zao)(zao)成(cheng)(cheng)燙金(jin)處(chu)0PP與紙(zhi)張分(fen)離而(er)影響(xiang)產品質量。正確的工藝是(shi)應先(xian)覆(fu)膜再燙金(jin)，選擇與OPP相匹配(pei)的電(dian)化鋁(lv)。