破壞(huai)了電(dian)(dian)化鋁(lv)(lv)(lv)表(biao)(biao)面(mian)光澤(ze)性(xing)(xing)，圖文輪廓(kuo)發虛：需要覆(fu)膜(mo)加工(gong)的燙金，因擔心金箔容易(yi)擦落而先燙印再(zai)覆(fu)膜(mo)。這(zhe)易(yi)造成(cheng)(cheng)薄膜(mo)（尤(you)其是亞光膜(mo)）會破壞(huai)電(dian)(dian)化鋁(lv)(lv)(lv)的表(biao)(biao)面(mian)光澤(ze)性(xing)(xing)，也不宜(yi)采用(yong)(yong)水溶性(xing)(xing)膠(jiao)水覆(fu)膜(mo)，否(fou)則會造成(cheng)(cheng)電(dian)(dian)化鋁(lv)(lv)(lv)表(biao)(biao)面(mian)發黑(hei)，同(tong)時極易(yi)造成(cheng)(cheng)金粉粘(zhan)在圖文邊(bian)緣(yuan)造成(cheng)(cheng)發虛現象。燙金后因壓(ya)力作用(yong)(yong)而凹陷(xian)，再(zai)加上(shang)膠(jiao)水不易(yi)滲(shen)透(tou)電(dian)(dian)化鋁(lv)(lv)(lv)表(biao)(biao)層，易(yi)造成(cheng)(cheng)燙金處0PP與(yu)紙張(zhang)分離而影響產品質量。正(zheng)確的工(gong)藝是應先覆(fu)膜(mo)再(zai)燙金，選擇(ze)與(yu)OPP相匹配的電(dian)(dian)化鋁(lv)(lv)(lv)。