FIELD: chemistry.
SUBSTANCE: glass is used for manufacturing decorative-artistic purpose items, bijouterie. Glass contains, wt %: SiO2 66.8-72.8; CaO 2.2-3.2; Na2O 18.0-22.0; CdO 0.2-0.3; Se 0.2-0.3; S' 0.2-0.3; B2O3 6.0-7.0; As2O3 0.2-0.3. Glass cooking is carried out in pot furnaces at temperature 1300-1330°C.
EFFECT: reduction of glass cooking temperature.
1 tbl
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