An experiment retail plastic packaging system was used to compare the atmospheric composition within sealed packs containing tomato fruits. A range of plastic films with different permeability properties were tested to study the effects of these conditions on the changes in postharvest qualities of tomatoes harvested at the pink stage of maturity and stored at 13 o C for 60 days. The films used were 20 micron (PE20) and 50 micron (PE50) polyethylene, 10 micron polyvinylcholoride (PVC) or 25 micron polypropylene (PP) compared with unwrapped fruit as a control. Tomatoes were evaluated for changes in colour, firmness, weight, titratable acidity, total soluble solids, decay and sensory attributes. All unwrapped tomatoes were overripe and soft after 30 days. Sealed packaging, especially using with PE50 and PP films, delayed the development of the red colour of tomatoes until 30 days of storage and those tomatoes were also still very firm even after 60 days of storage. Tomatoes sealed within PE50 and PP films had also the lowest weight loss and the highest soluble solids after 60 days of storage.
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机译：实验零售塑料包装系统用于比较包含番茄果实的密封包装内的大气成分。测试了一系列具有不同渗透性的塑料薄膜，以研究这些条件对番茄在粉红色成熟阶段收获后品质的变化的影响，并在13 o C下储存60天。与未包装的水果相比，使用的薄膜为20微米（PE20）和50微米（PE50）聚乙烯，10微米聚氯乙烯（PVC）或25微米聚丙烯（PP）。评估番茄的颜色，硬度，重量，可滴定酸度，总可溶性固形物，腐烂和感官特性的变化。 30天后，所有未包裹的西红柿均过熟且变软。密封包装，特别是与PE50和PP薄膜一起使用，将番茄的红色发展推迟到了30天的储藏期，即使储藏60天，这些西红柿也仍然非常坚固。储存60天后，密封在PE50和PP薄膜中的西红柿的重量损失最低，可溶性固形物含量最高。
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