破(po)壞(huai)了電(dian)化(hua)鋁(lv)(lv)(lv)表面(mian)(mian)光(guang)澤性，圖(tu)文輪廓發(fa)(fa)虛：需(xu)要覆膜(mo)(mo)加(jia)工(gong)的燙(tang)金，因(yin)擔心金箔容(rong)易擦落而先(xian)(xian)燙(tang)印再(zai)(zai)覆膜(mo)(mo)。這易造(zao)(zao)成(cheng)薄膜(mo)(mo)（尤其是亞光(guang)膜(mo)(mo)）會破(po)壞(huai)電(dian)化(hua)鋁(lv)(lv)(lv)的表面(mian)(mian)光(guang)澤性，也不(bu)宜采用(yong)水溶性膠(jiao)水覆膜(mo)(mo)，否則會造(zao)(zao)成(cheng)電(dian)化(hua)鋁(lv)(lv)(lv)表面(mian)(mian)發(fa)(fa)黑，同時極易造(zao)(zao)成(cheng)金粉(fen)粘在圖(tu)文邊緣造(zao)(zao)成(cheng)發(fa)(fa)虛現(xian)象(xiang)。燙(tang)金后因(yin)壓(ya)力作(zuo)用(yong)而凹陷(xian)，再(zai)(zai)加(jia)上膠(jiao)水不(bu)易滲透電(dian)化(hua)鋁(lv)(lv)(lv)表層，易造(zao)(zao)成(cheng)燙(tang)金處0PP與紙張分離而影響產(chan)品(pin)質(zhi)量。正確(que)的工(gong)藝是應先(xian)(xian)覆膜(mo)(mo)再(zai)(zai)燙(tang)金，選擇與OPP相匹配的電(dian)化(hua)鋁(lv)(lv)(lv)。