进口牛羊油的碱炼-脱色与直接脱色色泽的比较

Comparison of the colour of neutralized-bleached tallow with that of direct bleached tallow

对进口牛羊油碱炼-脱色色泽的标准检测方法测试结果与企业采用的直接脱色的色泽测试结果进行了对比。结果表明，进口牛羊油按标准方法经碱炼-脱色可达到较好的色泽，企业仅用活性漂土直接脱色效果较差，特别是对深色样品需4％～5％漂土用量或更多才能得到较好的效果。碱炼-脱色与直接脱色色泽之间没有可比性。

The standard method was used to test the colour of neutralized-bleached tallow, and the general method usually used by enterprise was to test the colour of direct bleached tallow. The results showed that the colour of neutralized-bleached tallow was better than that of direct bleached tallow. For deep colour sample,4% -5% bleaching earth dosage or more was need in direct bleaching. There is no uniform method for determination of the colour of bleached tallow, so it is hard to compare with the standard method.