破壞了電(dian)(dian)化(hua)鋁(lv)(lv)表(biao)面光(guang)澤(ze)性，圖(tu)(tu)文(wen)輪廓發虛：需(xu)要覆膜(mo)加(jia)工(gong)的燙(tang)(tang)(tang)金(jin)(jin)，因(yin)擔心(xin)金(jin)(jin)箔容易(yi)擦落而(er)先燙(tang)(tang)(tang)印再覆膜(mo)。這易(yi)造(zao)成(cheng)薄(bo)膜(mo)（尤其(qi)是亞(ya)光(guang)膜(mo)）會(hui)破壞電(dian)(dian)化(hua)鋁(lv)(lv)的表(biao)面光(guang)澤(ze)性，也不宜采用水(shui)溶性膠水(shui)覆膜(mo)，否則會(hui)造(zao)成(cheng)電(dian)(dian)化(hua)鋁(lv)(lv)表(biao)面發黑(hei)，同(tong)時極易(yi)造(zao)成(cheng)金(jin)(jin)粉粘在圖(tu)(tu)文(wen)邊緣造(zao)成(cheng)發虛現象。燙(tang)(tang)(tang)金(jin)(jin)后因(yin)壓力(li)作用而(er)凹陷(xian)，再加(jia)上膠水(shui)不易(yi)滲透電(dian)(dian)化(hua)鋁(lv)(lv)表(biao)層，易(yi)造(zao)成(cheng)燙(tang)(tang)(tang)金(jin)(jin)處0PP與紙(zhi)張分離而(er)影響(xiang)產品質量。正確的工(gong)藝是應先覆膜(mo)再燙(tang)(tang)(tang)金(jin)(jin)，選擇與OPP相匹配的電(dian)(dian)化(hua)鋁(lv)(lv)。