破壞(huai)(huai)了電(dian)(dian)(dian)化(hua)(hua)鋁(lv)表面(mian)光澤(ze)(ze)性，圖(tu)文輪廓發(fa)虛：需要覆膜(mo)加(jia)工(gong)的(de)燙金(jin)，因擔心金(jin)箔容易(yi)擦落而先燙印再(zai)覆膜(mo)。這(zhe)易(yi)造(zao)成(cheng)薄膜(mo)（尤其是亞光膜(mo)）會(hui)破壞(huai)(huai)電(dian)(dian)(dian)化(hua)(hua)鋁(lv)的(de)表面(mian)光澤(ze)(ze)性，也(ye)不宜采用(yong)水(shui)(shui)溶(rong)性膠(jiao)(jiao)水(shui)(shui)覆膜(mo)，否則會(hui)造(zao)成(cheng)電(dian)(dian)(dian)化(hua)(hua)鋁(lv)表面(mian)發(fa)黑，同時(shi)極易(yi)造(zao)成(cheng)金(jin)粉粘在圖(tu)文邊緣造(zao)成(cheng)發(fa)虛現象。燙金(jin)后因壓力作用(yong)而凹(ao)陷(xian)，再(zai)加(jia)上膠(jiao)(jiao)水(shui)(shui)不易(yi)滲透(tou)電(dian)(dian)(dian)化(hua)(hua)鋁(lv)表層，易(yi)造(zao)成(cheng)燙金(jin)處0PP與(yu)紙張(zhang)分離(li)而影響(xiang)產品(pin)質量(liang)。正確的(de)工(gong)藝是應先覆膜(mo)再(zai)燙金(jin)，選擇與(yu)OPP相匹(pi)配的(de)電(dian)(dian)(dian)化(hua)(hua)鋁(lv)。