什么是FD“FD”:中文全称真空冷冻干燥,在约零下30-50度低温下,真空状态下利用升华原理,使预先冻结食品中的水分不经过冰的融化,直接以冰态升华为水蒸汽被除去,从而使食品干燥。冻干食品的特点由于冻干食品避免了传统脱水技术方法带来的变色、变味、营养成分损失大、复水性差等缺陷,具有保持食品形、色、 What is FD “FD ”: Chinese full name vacuum freeze-drying, at about minus 30-50 degrees low temperature, the use of vacuum under the principle of sublimation, pre-freezing food in the water without melting ice directly sublimation Water vapor is removed, thus allowing the food to dry. Characteristics of freeze-dried food As the freeze-dried food to avoid the traditional methods of dehydration caused by discoloration, odors, loss of nutrients, loss of rehydration and poor, with the food shape, color,