Crispness, bowl life,water absorbable index(WAI),water soluble index(WSI),bulk density,solid density and eypansion ratio were analyzed as the main indexes.

• 选取脆性、保脆性、吸水率(WAI)、溶水率(WSI)、体积密度、固体密度和膨化度为主要指标进行研究。