Analysis of variance has shown that factor was affected by coating (p‹0.01). The result showed that all coatings have been soaring, but the highest changes of factor were in 80% chitosan + 20%aloe vera and 100% coverage, and the lowest changes were in 60% chitosan + 40% aloe vera coverage (Fig 2). The reason for this phenomenon is that when chitosan is blended with aloe vera inhabiting the enzymatic activity. Xu et al. (2001) found that a coating of chitosan and aloe vera increased (a*) factor, which is consistent with our results. Khoshnoudinia et al. (2012) reported that the use of an edible gelatine coating along with antioxidants, especially ascorbic acid, maintains a desirable green colour of pistachio in kiwi fruits. This might be the effect of edible coatings on reducing the oxidation process of grains and nuts.