Leaf greens COOLING
Vacuum cooling has been used as a pre-cooling treatment for vegetables such as lettuces, asparagus, peppermints , green onions, leaf herbs and broccolis etc to remove field heat and thus extend shelf life and quality.The major advantage of vacuum cooling over other techniques of cooling is the short time required to cool a suitable product to a given temperature.
Vacuum cooling has lead to changes in harvest and packaging,and shipping methods. Such as, vacuum cooler make it possible to harvest in poor weather , like rain, the hot noon if can put vacuum cooling machine immediately for leaf greens,cut flower etc which crops are sensitive to temperature and moisture. Another important beneficial of vacuum cooling is packing method, crops can be vacuum cooled after packed well in carton at improving the working effective and considerable saving in cost .