Comparative study on milk cake preservation by packed two different materials after irradiated.

Milk cakes packed by aluminium foil bag and vacuum bag were irradiated at 8kGy by 60Co.The purpose of this research was to investigate the change of sensory evaluation,water content,PH value,acid value within one-month retention period.The result showed that there was no significant difference between the milk cakes packed by aluminium foil bag and vacuum bag after irradiated within one-month retention period.Sensory evaluation of milk cakes packed by aluminium foil bag was slightly better than those by vacuum bags,but it was difficult to observe the inner change of milk cake content packed by was aluminium foil bag and the cost of aluminium foil bag was higher.Therefore,vacuum bag is recommended in the production.