in the case of a method for manufacturing glass , with which molten glass is enclosed at least partially by precious metal walls or refractory metal walls , and with which the oxygen partial pressure of the molten glass is influenced by a treatment means to prevent disturbances , gas bubbles or other disturbances often form as a result of over - compensation . this over - compensation can be prevented by locating at least one probe for determining the oxygen partial pressure at the interface — or close to the interface — of the glass melt and metal wall , and by regulating the influencing of the oxygen partial pressure in a safe range of the oxygen partial pressure with the treatment means using a regulating system .