破(po)壞了電(dian)(dian)(dian)(dian)化鋁(lv)(lv)(lv)表面(mian)光澤性(xing)，圖(tu)文輪(lun)廓發(fa)(fa)虛：需要覆(fu)(fu)膜加(jia)工的(de)燙金，因(yin)擔心(xin)金箔容易擦落而(er)先(xian)燙印再覆(fu)(fu)膜。這易造成薄膜（尤其是(shi)亞光膜）會(hui)破(po)壞電(dian)(dian)(dian)(dian)化鋁(lv)(lv)(lv)的(de)表面(mian)光澤性(xing)，也不(bu)宜(yi)采用(yong)水(shui)(shui)(shui)溶(rong)性(xing)膠水(shui)(shui)(shui)覆(fu)(fu)膜，否則會(hui)造成電(dian)(dian)(dian)(dian)化鋁(lv)(lv)(lv)表面(mian)發(fa)(fa)黑，同時極易造成金粉粘在圖(tu)文邊緣(yuan)造成發(fa)(fa)虛現(xian)象。燙金后因(yin)壓力作用(yong)而(er)凹陷，再加(jia)上膠水(shui)(shui)(shui)不(bu)易滲透電(dian)(dian)(dian)(dian)化鋁(lv)(lv)(lv)表層(ceng)，易造成燙金處0PP與紙張分(fen)離(li)而(er)影(ying)響產品質量。正確的(de)工藝是(shi)應先(xian)覆(fu)(fu)膜再燙金，選擇與OPP相(xiang)匹配(pei)的(de)電(dian)(dian)(dian)(dian)化鋁(lv)(lv)(lv)。