Figure 3 shows that turbidity of all prepared dispersions is reduced by passing the time. The turbidity value is rapidly decreased in period of 10 hours and then the slope is reduced gradually. The prepared dispersions without dispersing agents have the minimum amount of turbidity which can be attributed to the dye particles’ aggregation and sedimentation. Because of the lack of dispersing agents in water, the aggregation of dye particles occurs rapidly. Therefore, even at early times, the turbidity value is low. By increasing the time, the turbidity value is decreased obviously almost to zero. Figure 3 displays that Irgasol DAM has the most turbidity and stability in comparison with the other prepared dispersions.