Techniques of quick-freezing keeping-fresh and dehydration process of Chinese toon

In order to seek effective ways and methods of the drying process and industrial production of toon bud,techniques of quick-freezing fresh-keeping and dehydration process were reseached.The results showed that toon bud could maintain good color with alkali of 1% and blanching at 95 ℃ in frozen food process.After blanching,color was better for longer soaking time at the low temperature conditions.Once the water temperature began to rise,water must be changed or stepped cooling immediately.According to frozen toon less than 0.5 kg per bag,toon was put into plastic bags for packaging and storaging,speading and end to end row,folded bag mouth,and quickly frozen,the best color could be maintained through the treatmen.Dehydration process of toon before cooling was the same as freezing process,and then dehydrating by centrifuge,drying.The optimal drying process was drying at 95 ℃ for 0.5 h,drying at 85 ℃ for 2 h,and then drying at 70 ℃ for 0.5 h.