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)塑料包裝袋可以有效延長(zhǎng)水果和蔬菜的儲(chǔ)存期。水果和蔬菜是高水分、水溶性營(yíng)養(yǎng)素和酶的有機(jī)食品。水果和蔬菜在儲(chǔ)存期間會(huì)有很強(qiáng)的呼吸活動(dòng)。水果和蔬菜儲(chǔ)存在塑料包裝袋中。塑料包裝袋的嘴巴每?jī)扇齑蜷_一次，釋放二氧化碳和熱量，然后綁住嘴巴。降低氧濃度和增加二氧化碳濃度的原理可以有效減少水果和蔬菜的腐爛和變質(zhì)。日常生活中常用的方法是將水果和蔬菜儲(chǔ)存在塑料袋中，尤其是在冬天，它們可以保持水果和蔬菜的新鮮。

(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)果蔬塑料包裝袋的儲(chǔ)存時(shí)間不宜過長(zhǎng)。降低氧氣濃度和增加二氧化碳濃度可以減緩果蔬的呼吸，但過度控制會(huì)使果蔬分解更多的營(yíng)養(yǎng)，從而獲得足夠的能量，保持果蔬中低氧氣呼吸產(chǎn)生的酒精，從而導(dǎo)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，用于打底和相應(yīng)的彩色版本。它可以在電子雕刻系統(tǒng)中操作，也可以在印前規(guī)劃系統(tǒng)中規(guī)劃，然后直接在電子雕刻機(jī)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.

若在機(jī)組式印刷機(jī)上印刷，詳細(xì)步驟為裝版、上刮墨刀、準(zhǔn)備油墨調(diào)墨、上卷、試墨、調(diào)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.

彩印塑料包裝袋中的涂層是在專用的涂層機(jī)上進(jìn)行的。制作塑料包裝袋的是制袋，實(shí)踐是粘結(jié)。將兩層薄膜粘結(jié)成三面密封的塑料包裝袋，切割成單個(gè)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.