Results show that the change of color values of apple juice filtrated by metal membrane is not distinct,the greatest decrease of color value is 2%.

• 结果表明,金属膜过滤前后果汁的色值变化差异不大,试验中色值降低的最大值为2%25;纸板过滤的果汁色值差异较大,试验中色值降低的最小值为7%25;