Effect of different storage conditions on freeze-dried litchi pulp color

The Freeze-dried Litchi of HuaiZhi was used to study the change of color in different storage conditions. The results showed that the main factors affecting color change to freeze-dried litchi was the storage temperature, surface humidity and oxygen concentration. The freeze-dried Litchi stored in a sealed container at 37℃ occurred browning and shrinking after two weeks. The situation became worse when the freeze-dried Litchi stored in a opened container at 37℃, relative humidity 65%～70%. But the other groups stored in low-temperature (4℃) and sealed container for 90d maintained the original color and crispness. But the color of freeze-dried Litchi stored in a sealed container at 25℃ had significant change. The environment of low temperature and low humidity was the ideal storage conditions for protecting the color of freeze-dried Litchi.