破壞了電(dian)(dian)化鋁(lv)(lv)表(biao)(biao)面光澤(ze)性，圖文(wen)輪廓發虛：需要覆膜(mo)加(jia)工的燙(tang)金(jin)，因擔心金(jin)箔(bo)容易(yi)擦(ca)落(luo)而先燙(tang)印再覆膜(mo)。這易(yi)造(zao)(zao)成(cheng)(cheng)薄膜(mo)（尤其是(shi)亞光膜(mo)）會破壞電(dian)(dian)化鋁(lv)(lv)的表(biao)(biao)面光澤(ze)性，也不宜采用(yong)水溶性膠水覆膜(mo)，否(fou)則會造(zao)(zao)成(cheng)(cheng)電(dian)(dian)化鋁(lv)(lv)表(biao)(biao)面發黑(hei)，同時極易(yi)造(zao)(zao)成(cheng)(cheng)金(jin)粉粘(zhan)在圖文(wen)邊緣造(zao)(zao)成(cheng)(cheng)發虛現象。燙(tang)金(jin)后因壓力(li)作(zuo)用(yong)而凹陷(xian)，再加(jia)上(shang)膠水不易(yi)滲透電(dian)(dian)化鋁(lv)(lv)表(biao)(biao)層，易(yi)造(zao)(zao)成(cheng)(cheng)燙(tang)金(jin)處0PP與紙張分離(li)而影響產(chan)品質量。正確的工藝是(shi)應先覆膜(mo)再燙(tang)金(jin)，選擇與OPP相匹配(pei)的電(dian)(dian)化鋁(lv)(lv)。