破壞(huai)了電(dian)化(hua)(hua)鋁(lv)(lv)表(biao)面(mian)光澤(ze)性(xing)，圖(tu)文(wen)輪廓發(fa)虛(xu)：需要覆(fu)膜加工的(de)燙(tang)金，因擔心金箔容易(yi)擦落而先(xian)(xian)燙(tang)印再覆(fu)膜。這易(yi)造(zao)成(cheng)(cheng)(cheng)(cheng)薄膜（尤(you)其是亞光膜）會(hui)破壞(huai)電(dian)化(hua)(hua)鋁(lv)(lv)的(de)表(biao)面(mian)光澤(ze)性(xing)，也不(bu)宜采(cai)用水溶性(xing)膠水覆(fu)膜，否則會(hui)造(zao)成(cheng)(cheng)(cheng)(cheng)電(dian)化(hua)(hua)鋁(lv)(lv)表(biao)面(mian)發(fa)黑(hei)(hei)，同(tong)時極易(yi)造(zao)成(cheng)(cheng)(cheng)(cheng)金粉粘在圖(tu)文(wen)邊緣(yuan)造(zao)成(cheng)(cheng)(cheng)(cheng)發(fa)虛(xu)現(xian)象。燙(tang)金后因壓力作用而凹陷，再加上膠水不(bu)易(yi)滲透(tou)電(dian)化(hua)(hua)鋁(lv)(lv)表(biao)層(ceng)，易(yi)造(zao)成(cheng)(cheng)(cheng)(cheng)燙(tang)金處0PP與紙張(zhang)分(fen)離而影(ying)響(xiang)產品質量(liang)。正確的(de)工藝(yi)是應先(xian)(xian)覆(fu)膜再燙(tang)金，選(xuan)擇與OPP相匹配的(de)電(dian)化(hua)(hua)鋁(lv)(lv)。