破(po)壞(huai)了電(dian)(dian)(dian)化鋁(lv)(lv)表(biao)面光(guang)澤性，圖文輪廓發(fa)(fa)虛：需(xu)要(yao)覆(fu)膜(mo)(mo)(mo)加工的(de)燙(tang)金(jin)，因擔心金(jin)箔容(rong)易擦落而(er)(er)先(xian)燙(tang)印(yin)再覆(fu)膜(mo)(mo)(mo)。這易造(zao)成(cheng)(cheng)(cheng)薄膜(mo)(mo)(mo)（尤其是(shi)(shi)亞光(guang)膜(mo)(mo)(mo)）會破(po)壞(huai)電(dian)(dian)(dian)化鋁(lv)(lv)的(de)表(biao)面光(guang)澤性，也不宜采用(yong)(yong)水溶性膠水覆(fu)膜(mo)(mo)(mo)，否則會造(zao)成(cheng)(cheng)(cheng)電(dian)(dian)(dian)化鋁(lv)(lv)表(biao)面發(fa)(fa)黑，同時極易造(zao)成(cheng)(cheng)(cheng)金(jin)粉(fen)粘在圖文邊(bian)緣造(zao)成(cheng)(cheng)(cheng)發(fa)(fa)虛現(xian)象。燙(tang)金(jin)后因壓(ya)力作(zuo)用(yong)(yong)而(er)(er)凹陷(xian)，再加上膠水不易滲透電(dian)(dian)(dian)化鋁(lv)(lv)表(biao)層，易造(zao)成(cheng)(cheng)(cheng)燙(tang)金(jin)處(chu)0PP與(yu)紙張分離(li)而(er)(er)影響產品質(zhi)量。正確(que)的(de)工藝是(shi)(shi)應(ying)先(xian)覆(fu)膜(mo)(mo)(mo)再燙(tang)金(jin)，選擇與(yu)OPP相(xiang)匹配(pei)的(de)電(dian)(dian)(dian)化鋁(lv)(lv)。