FIELD: metallurgy.
SUBSTANCE: mixture contains, wt %: liquid glass 4-6, oxidant in form of potassium permanganate or potassium dichromate 0.5-1.5, quartz sand - the rest.
EFFECT: introduction of oxidant facilitates high strength of casting moulds at their fabrication and metal casting and improves knock-out of mixture.
2 tbl, 2 ex
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