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包装即是在物品外附加保护层。除考虑装璜之外,如何使物品长期贮存不变质是人们所关心的研究课题。为避免大气包装中的弊病,近年采用真空包装,即物品处于真空气氛下进行封装。真空使物品与外界空气隔绝。在真空气氛中,水蒸汽、氧气含量大大减少,既避免了物品的氧化反应,又抑制了微生物、昆虫之类的生长、发育,从而使物品不霉、不烂、且保持原有色泽和品味,达到较长期贮存之目的。
The package is the additional protection layer outside the item. In addition to considering the decoration, how to make the long-term storage of goods without deterioration is a subject of concern. In order to avoid the disadvantages of atmospheric packaging, vacuum packaging in recent years, that is, the items in a vacuum atmosphere for packaging. Vacuum isolates items from the outside world. In the vacuum atmosphere, the content of water vapor and oxygen is greatly reduced, which not only avoids the oxidation reaction but also inhibits the growth and development of microorganisms, insects and the like, so that the objects are not mildew, rotten, and maintain the original color and taste , To achieve longer-term storage purposes.