破壞(huai)(huai)了(le)電(dian)(dian)化(hua)鋁表(biao)面(mian)(mian)光澤性(xing)，圖文輪廓發虛：需(xu)要覆膜(mo)(mo)加工(gong)的(de)燙(tang)(tang)金(jin)(jin)，因擔心金(jin)(jin)箔容易擦(ca)落而先燙(tang)(tang)印再覆膜(mo)(mo)。這易造(zao)成(cheng)(cheng)薄膜(mo)(mo)（尤(you)其(qi)是(shi)亞光膜(mo)(mo)）會(hui)破壞(huai)(huai)電(dian)(dian)化(hua)鋁的(de)表(biao)面(mian)(mian)光澤性(xing)，也(ye)不宜采用水(shui)溶性(xing)膠水(shui)覆膜(mo)(mo)，否則會(hui)造(zao)成(cheng)(cheng)電(dian)(dian)化(hua)鋁表(biao)面(mian)(mian)發黑(hei)，同(tong)時極易造(zao)成(cheng)(cheng)金(jin)(jin)粉(fen)粘在圖文邊緣造(zao)成(cheng)(cheng)發虛現象。燙(tang)(tang)金(jin)(jin)后因壓力作(zuo)用而凹(ao)陷，再加上膠水(shui)不易滲(shen)透電(dian)(dian)化(hua)鋁表(biao)層，易造(zao)成(cheng)(cheng)燙(tang)(tang)金(jin)(jin)處(chu)0PP與紙張(zhang)分離而影響產品質(zhi)量。正確的(de)工(gong)藝是(shi)應先覆膜(mo)(mo)再燙(tang)(tang)金(jin)(jin)，選擇(ze)與OPP相匹配的(de)電(dian)(dian)化(hua)鋁。