In commercial glass making, the presence of water vapor from oxyfuel combustion in the furnace atmosphere can cause excessive foaming and thus reduce the efficiency of heat transfer from the flames to the melt. 1-3 Löffler 4 compiled literature findings on the influence of water vapor on batch melting from the 1920s to the 1960s. He suggested that water can enter the glass melt from the glass batch provided that the batch absorbed water from the furnace atmosphere. Several papers studied melting behavior of glass batches under the effect of batch component moisture and chemically bonded water. Formation and dissolution of different phases during batch-to-glass conversion has also been examined. 4-8 Dubois and Conradt 9 found that water addition enhances silica particle dissolution in commercial flint and amber glass batches. Okamura and Uno 10 found that less time was required for complete conversion of batch to bubble-free melt when the water content of the melt was higher. However, Löffler 4 also points out that the amount of water that can enter the melt is limited. A substantial amount of work investigating the influence of water vapor on the melting and foaming behavior