The effects of dyeing process conditions on the stability of prepared dispersions are studied on different concentrations of dyes (0.4% and 1%). This process was carried out without any fibers. The turbidity of the prepared dispersions containing Irgasol DAM and Asutol 644 and the effect of auxiliaries on the prepared dispersions before and after dyeing process are measured. The prepared dispersions are poured into the dyebath and then the temperature is increased to 130C. The results obtained from turbidity measurements before and after dyeing process are shown in Figure 6. These results show that the turbidity of Irgasol DAM is more than Asutol 644 in the same conditions. In addition, in both dispersing agents the maximum turbidity amounts belong to the prepared dispersion containing wetting agents and b-cyclodextrin. It is due to that inclusion complex is the complex formed by another molecule (disperse dye) filling out the space of b-cyclodextrin molecule (host). When b-cyclodextrins are solubilized in water, polar water molecules in the space are repelled by apolar inner surface and it passes into unstable state from the energy viewpoint. Hydrophilic part of the guest molecule (disperse dye) has fairly high hydratation, whereas the water molecules in the medium repel apolar aromatic cyclic part. A more stable inclusion complex is formed; as the disperse dye molecule enters to the space of apolar b-cyclodextrin.[30] Size of the ‘‘guest’’ molecule (disperse dye) must be well suited to the space of b-cyclodextrin. This suitability is one of the most important factors in complex formation.[25] Complex formation occurs through the equilibrium depending on water, chemical, and b-cyclodextrin concentration.