The effect of iron oxides on the physicochemical properties of primer enamels that regulate capillary movement of gas bubbles was investigated. The rates of capillary movement of bubbles in an enamel melt were calculated based on two mechanisms: thermodynamic and Marangoni film flow. The duration of migration of gas bubbles from the enamel layer under the effect of capillary force was determined in approximating the predominant role of the thermodynamic mechanism.