破壞了(le)電(dian)(dian)化(hua)鋁(lv)(lv)表面(mian)(mian)光澤性(xing)，圖文(wen)輪(lun)廓發(fa)虛(xu)：需要覆(fu)膜加工(gong)的燙(tang)(tang)(tang)(tang)金，因擔(dan)心金箔容易(yi)擦落(luo)而(er)(er)先(xian)燙(tang)(tang)(tang)(tang)印再覆(fu)膜。這易(yi)造(zao)(zao)成(cheng)薄膜（尤其是亞光膜）會破壞電(dian)(dian)化(hua)鋁(lv)(lv)的表面(mian)(mian)光澤性(xing)，也(ye)不(bu)(bu)宜(yi)采(cai)用(yong)水溶(rong)性(xing)膠水覆(fu)膜，否則會造(zao)(zao)成(cheng)電(dian)(dian)化(hua)鋁(lv)(lv)表面(mian)(mian)發(fa)黑，同時極(ji)易(yi)造(zao)(zao)成(cheng)金粉粘在圖文(wen)邊緣造(zao)(zao)成(cheng)發(fa)虛(xu)現象。燙(tang)(tang)(tang)(tang)金后因壓力作用(yong)而(er)(er)凹(ao)陷，再加上膠水不(bu)(bu)易(yi)滲(shen)透電(dian)(dian)化(hua)鋁(lv)(lv)表層，易(yi)造(zao)(zao)成(cheng)燙(tang)(tang)(tang)(tang)金處0PP與紙張分離而(er)(er)影響產品質量。正確的工(gong)藝(yi)是應先(xian)覆(fu)膜再燙(tang)(tang)(tang)(tang)金，選(xuan)擇與OPP相(xiang)匹配(pei)的電(dian)(dian)化(hua)鋁(lv)(lv)。