破(po)壞了(le)電(dian)(dian)化鋁(lv)表(biao)面光(guang)(guang)澤(ze)性，圖文輪廓發虛：需要覆(fu)(fu)(fu)膜加工的(de)(de)燙金，因擔心(xin)金箔容易(yi)擦落而先燙印再覆(fu)(fu)(fu)膜。這(zhe)易(yi)造(zao)成(cheng)(cheng)薄膜（尤其是亞光(guang)(guang)膜）會破(po)壞電(dian)(dian)化鋁(lv)的(de)(de)表(biao)面光(guang)(guang)澤(ze)性，也不(bu)宜(yi)采用(yong)水溶性膠水覆(fu)(fu)(fu)膜，否則會造(zao)成(cheng)(cheng)電(dian)(dian)化鋁(lv)表(biao)面發黑，同時(shi)極易(yi)造(zao)成(cheng)(cheng)金粉粘在圖文邊緣(yuan)造(zao)成(cheng)(cheng)發虛現象(xiang)。燙金后因壓力作(zuo)用(yong)而凹陷，再加上(shang)膠水不(bu)易(yi)滲(shen)透(tou)電(dian)(dian)化鋁(lv)表(biao)層，易(yi)造(zao)成(cheng)(cheng)燙金處0PP與紙張分離而影響(xiang)產品質(zhi)量。正確的(de)(de)工藝是應(ying)先覆(fu)(fu)(fu)膜再燙金，選擇與OPP相匹配(pei)的(de)(de)電(dian)(dian)化鋁(lv)。