For the production of trial melting the necessary batch recipe has to be ascertained on the basis of an intended composition of glass.
The recipe factors in the utilized raw materials as soon as technological influential variables simultaneously (f. ex. Combustion). As diverse raw materials can be employed diverse for inserting certain oxides in the molten glass (f. ex. for sodium oxide, sodium carbonate, sodium sulfate and sodium chloride) the batch calculation in different phases is not unambiguous, but contains optimization steps.