破(po)壞了電(dian)(dian)(dian)化鋁表(biao)面(mian)光(guang)(guang)(guang)澤性(xing)，圖文(wen)輪廓發(fa)虛：需(xu)要覆(fu)膜(mo)加工的燙金(jin)(jin)，因(yin)擔心金(jin)(jin)箔容易(yi)擦落(luo)而先燙印再(zai)(zai)覆(fu)膜(mo)。這易(yi)造成(cheng)(cheng)薄膜(mo)（尤其是亞(ya)光(guang)(guang)(guang)膜(mo)）會破(po)壞電(dian)(dian)(dian)化鋁的表(biao)面(mian)光(guang)(guang)(guang)澤性(xing)，也不(bu)宜采(cai)用水(shui)溶性(xing)膠(jiao)水(shui)覆(fu)膜(mo)，否(fou)則會造成(cheng)(cheng)電(dian)(dian)(dian)化鋁表(biao)面(mian)發(fa)黑(hei)，同時(shi)極易(yi)造成(cheng)(cheng)金(jin)(jin)粉粘在圖文(wen)邊緣(yuan)造成(cheng)(cheng)發(fa)虛現象。燙金(jin)(jin)后因(yin)壓力作用而凹陷，再(zai)(zai)加上膠(jiao)水(shui)不(bu)易(yi)滲透電(dian)(dian)(dian)化鋁表(biao)層，易(yi)造成(cheng)(cheng)燙金(jin)(jin)處0PP與(yu)紙張分離而影(ying)響(xiang)產品質量。正確的工藝(yi)是應(ying)先覆(fu)膜(mo)再(zai)(zai)燙金(jin)(jin)，選擇與(yu)OPP相匹配的電(dian)(dian)(dian)化鋁。