Quantitative Analysis of Color of Paper-making Process Reconstituted Tobacco

Dissatisfied with the qualitative description at present, a quantitative color measuring method of paper-making process reconstituted tobacco was established based on CIE1976L^*a^*b^* uniform color space theory and automatic colorimeter.The results showed that: 1) L^*, a^*, b^* could pretty well reflect color quality with good repeatability(RSD<5%) and serve as the color index of paper-making process reconstituted tobacco;2) L^* was relatively obviously affected by the moisture content in samples, therefore the samples should be equilibrated before test;3) the testing results of intra-and inter-batch indicated that the fluctuation range of L^* was wider than that of a^* and b^*, and wider between batches than in the same batch.For the requirements of color control of paper-making process reconstituted tobacco, the tolerance of L^* was suggested to be±2.50 and that of a^* and b^* to be±2.00.