FIELD: foundry; applicable in manufacture of shell molds. SUBSTANCE: suspension for manufacture of shell investment molds includes the following ingredients, mas.%: base silica sol, 34.3-29.75; ethyl silicate, 0.7-5.25; surfactant, 0.1-0.2; refractory filling, the balance. EFFECT: increased strength of shell molds and elimination of cracking due to use in suspension of silica sol and ethyl in preset ratios, and reduced suspension toxicity due to relatively low content of ethyl silicate in suspension. 1 tbl
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