Abstract: The effects of carriers on emulsion swelling were studied. The interfacial tension between the membrane phase and the external aqueous phase was measured. The existence of carrier in the membrane phase decreased the interfacial tension. This phenomenon shows that carrier is adsorbed on the interface. The adsorption behavior and a monomolecular film of surfactant and carrier are vital in emulsion swelling. The results indicate that water entrainment is lowered as carrier concentration increases and an increase in carrier concentration increases the rate of water permeation through the liquid membrane Two modified models for estimating entrainment swelling and permeation swelling are proposed, which give excellent fit to the experimental data.