所有進(jin)出口包(bao)裝(zhuang)(zhuang)箱必須要有真(zhen)(zhen)空(kong)包(bao)裝(zhuang)(zhuang)，其工(gong)藝(yi)特點為工(gong)件與木箱之(zhi)間增加(jia)一只(zhi)真(zhen)(zhen)空(kong)包(bao)裝(zhuang)(zhuang)套，通(tong)常為鋁泊紙(zhi)，并(bing)加(jia)上幾層(ceng)緩沖(chong)材(cai)料，真(zhen)(zhen)空(kong)包(bao)裝(zhuang)(zhuang)是將(jiang)包(bao)裝(zhuang)(zhuang)袋內抽成低(di)真(zhen)(zhen)空(kong)后，再(zai)行(xing)(xing)封口。經真(zhen)(zhen)空(kong)包(bao)裝(zhuang)(zhuang)后的產品(pin)可(ke)縮小體積(ji)；使(shi)包(bao)裝(zhuang)(zhuang)物(wu)品(pin)達到防(fang)潮、防(fang)霉(mei)、防(fang)污(wu)染、防(fang)氧化、防(fang)銹的目次。目前國(guo)際運輸多為海運，一般在海上漂(piao)泊時間為10~50天(tian)。因各地濕(shi)度(du)、溫(wen)度(du)不同(tong)，同(tong)時各大洋內濕(shi)度(du)較大，工(gong)件極容(rong)易生(sheng)銹，故它是一種切實有效，行(xing)(xing)之(zhi)可(ke)行(xing)(xing)的長途(tu)防(fang)生(sheng)銹措施。