Plastic packaging bags are common containers in daily life. Plastic packaging bags are waterproof and windproof, lightweight, not afraid of falling or touching, and easy to carry. They are trusted and praised by consumers. In order to fully utilize the role of plastic packaging bags and improve their value, many people use plastic packaging bags in their daily lives to preserve various fruits and vegetables. However, when packaging vegetables and fruits in plastic bags, we should pay special attention.

(1)塑料包装袋可以有效延长水果和蔬菜的储存期。水果和蔬菜是高水分、水溶性营养素和酶的有机食品。水果和蔬菜在储存期间会有很强的呼吸活动。水果和蔬菜储存在塑料包装袋中。塑料包装袋的嘴巴每两三天打开一次，释放二氧化碳和热量，然后绑住嘴巴。降低氧浓度和增加二氧化碳浓度的原理可以有效减少水果和蔬菜的腐烂和变质。日常生活中常用的方法是将水果和蔬菜储存在塑料袋中，尤其是在冬天，它们可以保持水果和蔬菜的新鲜。

(1) Plastic packaging bags can effectively extend the storage period of fruits and vegetables. Fruits and vegetables are organic foods with high moisture content, water-soluble nutrients, and enzymes. Fruits and vegetables exhibit strong respiratory activity during storage. Fruits and vegetables are stored in plastic packaging bags. The mouth of the plastic packaging bag is opened every two to three days to release carbon dioxide and heat, and then the mouth is tied. The principle of reducing oxygen concentration and increasing carbon dioxide concentration can effectively reduce the decay and spoilage of fruits and vegetables. The commonly used method in daily life is to store fruits and vegetables in plastic bags, especially in winter, as they can keep the fruits and vegetables fresh.

(2)果蔬塑料包装袋的储存时间不宜过长。降低氧气浓度和增加二氧化碳浓度可以减缓果蔬的呼吸，但过度控制会使果蔬分解更多的营养，从而获得足够的能量，保持果蔬中低氧气呼吸产生的酒精，从而导致衰老。

(2) The storage time of plastic packaging bags for fruits and vegetables should not be too long. Reducing oxygen concentration and increasing carbon dioxide concentration can slow down the respiration of fruits and vegetables, but excessive control can cause fruits and vegetables to decompose more nutrients, thereby obtaining enough energy to maintain the alcohol produced by low oxygen respiration in fruits and vegetables, leading to aging.

印刷前，行分色制版。分色制版需要白色版，用于打底和相应的彩色版本。它可以在电子雕刻系统中操作，也可以在印前规划系统中规划，然后直接在电子雕刻机上雕刻印刷版本。

Before printing, perform color separation and plate making. Color separation plate making requires a white version for the base and corresponding color version. It can be operated in an electronic engraving system or planned in a prepress planning system, and then printed versions can be carved directly on an electronic engraving machine.

若在机组式印刷机上印刷，详细步骤为装版、上刮墨刀、准备油墨调墨、上卷、试墨、调理、正式印刷。

If printing on a unit printing machine, the detailed steps include plate installation, ink scraper installation, preparation of ink adjustment, roll up, ink testing, conditioning, and formal printing.

彩印塑料包装袋中的涂层是在专用的涂层机上进行的。制作塑料包装袋的是制袋，实践是粘结。将两层薄膜粘结成三面密封的塑料包装袋，切割成单个袋子。

The coating in color printed plastic packaging bags is carried out on a dedicated coating machine. Making plastic packaging bags involves bag making, while practice involves bonding. Bond two layers of film into a three sided sealed plastic packaging bag and cut it into a single bag.