破壞(huai)了電(dian)(dian)化(hua)(hua)鋁表面(mian)光(guang)澤(ze)性，圖文輪廓發虛：需要覆(fu)膜(mo)加(jia)工(gong)的燙金，因(yin)擔心(xin)金箔容易擦落(luo)而先(xian)燙印(yin)再覆(fu)膜(mo)。這易造(zao)(zao)(zao)成薄膜(mo)（尤(you)其(qi)是(shi)亞光(guang)膜(mo)）會(hui)破壞(huai)電(dian)(dian)化(hua)(hua)鋁的表面(mian)光(guang)澤(ze)性，也不宜采用水溶性膠(jiao)水覆(fu)膜(mo)，否則(ze)會(hui)造(zao)(zao)(zao)成電(dian)(dian)化(hua)(hua)鋁表面(mian)發黑(hei)，同時極易造(zao)(zao)(zao)成金粉(fen)粘在(zai)圖文邊(bian)緣(yuan)造(zao)(zao)(zao)成發虛現象。燙金后因(yin)壓力(li)作用而凹陷，再加(jia)上膠(jiao)水不易滲透電(dian)(dian)化(hua)(hua)鋁表層，易造(zao)(zao)(zao)成燙金處0PP與紙張分離(li)而影響產品質(zhi)量。正確的工(gong)藝是(shi)應先(xian)覆(fu)膜(mo)再燙金，選擇與OPP相(xiang)匹配的電(dian)(dian)化(hua)(hua)鋁。