破(po)壞(huai)了(le)電(dian)(dian)化鋁(lv)(lv)表面光(guang)(guang)澤性，圖(tu)文(wen)輪(lun)廓發(fa)虛(xu)：需要(yao)覆膜加工(gong)的(de)燙(tang)(tang)金(jin)，因擔心金(jin)箔容易(yi)擦(ca)落(luo)而先(xian)(xian)燙(tang)(tang)印再(zai)覆膜。這易(yi)造(zao)(zao)成(cheng)薄膜（尤其是亞光(guang)(guang)膜）會破(po)壞(huai)電(dian)(dian)化鋁(lv)(lv)的(de)表面光(guang)(guang)澤性，也不(bu)(bu)宜采用水溶(rong)性膠水覆膜，否則會造(zao)(zao)成(cheng)電(dian)(dian)化鋁(lv)(lv)表面發(fa)黑，同時(shi)極易(yi)造(zao)(zao)成(cheng)金(jin)粉(fen)粘在圖(tu)文(wen)邊緣造(zao)(zao)成(cheng)發(fa)虛(xu)現象。燙(tang)(tang)金(jin)后因壓力(li)作用而凹陷，再(zai)加上膠水不(bu)(bu)易(yi)滲透(tou)電(dian)(dian)化鋁(lv)(lv)表層，易(yi)造(zao)(zao)成(cheng)燙(tang)(tang)金(jin)處(chu)0PP與紙(zhi)張分離而影響產品質量。正(zheng)確的(de)工(gong)藝(yi)是應先(xian)(xian)覆膜再(zai)燙(tang)(tang)金(jin)，選擇與OPP相匹配(pei)的(de)電(dian)(dian)化鋁(lv)(lv)。