破(po)壞了電(dian)化(hua)鋁表面(mian)光(guang)澤性(xing)(xing)，圖文(wen)輪廓發虛：需(xu)要(yao)覆膜(mo)加工(gong)的燙(tang)金(jin)(jin)，因擔心(xin)金(jin)(jin)箔容易擦(ca)落而(er)(er)先燙(tang)印再覆膜(mo)。這易造(zao)(zao)成(cheng)薄膜(mo)（尤其(qi)是(shi)亞光(guang)膜(mo)）會破(po)壞電(dian)化(hua)鋁的表面(mian)光(guang)澤性(xing)(xing)，也(ye)不(bu)宜采用水(shui)溶性(xing)(xing)膠(jiao)水(shui)覆膜(mo)，否則會造(zao)(zao)成(cheng)電(dian)化(hua)鋁表面(mian)發黑(hei)(hei)，同(tong)時極易造(zao)(zao)成(cheng)金(jin)(jin)粉粘在圖文(wen)邊緣造(zao)(zao)成(cheng)發虛現象(xiang)。燙(tang)金(jin)(jin)后因壓力作用而(er)(er)凹(ao)陷，再加上(shang)膠(jiao)水(shui)不(bu)易滲透電(dian)化(hua)鋁表層(ceng)，易造(zao)(zao)成(cheng)燙(tang)金(jin)(jin)處0PP與紙張(zhang)分離而(er)(er)影響產品質量。正確(que)的工(gong)藝是(shi)應(ying)先覆膜(mo)再燙(tang)金(jin)(jin)，選擇與OPP相匹配的電(dian)化(hua)鋁。