FIELD: chemistry.
SUBSTANCE: ground silicate glass is mixed with a carbonate-containing gas-forming agent. The gas-forming agent is saturated with 3-5% aqueous cobalt nitrate or nickel nitrate or copper nitrate or manganese nitrate solution, followed by drying to constant mass. The mixture is laid down, dried, annealed and then cooled.
EFFECT: simple method of producing coloured foamed glass.
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