Аннотация:Possibilities of substitution of molding sand with conventional amounts of liquid glass as binder by mixtures with a low content of liquid glass are studied. The possible variants of formulations are analyzed and physical and mechanical properties of mixtures are simulated. In the example of optimization of mixture composition of liquid glass with a high-performance hardener it is shown that the optimum composition of molding sand can be found using a ridge analysis of mathematical models " composition – properties"