FIELD: chemistry.
SUBSTANCE: cut glass comprises the following in wt %: SiO2 52.0-53.5; B2O3 2.2-4.0; CaO 16.7-17.5; ZnO 6.0-6.5; Na2O 1.0-2.5; K2O 8.5-10.0; CdO 4.2-5.0; PbO 4.8-5.2. SiO2 52.0-53.5; B2O3 2.2-4.0; CaO 16.7-17.5; ZnO 6.0-6.5; Na2O 1.0-2.5; K2O 8.5-10.0; CdO 4.2-5.0; PbO 4.8-5.2. The invention is developed in subclaims.
EFFECT: high heat resistance.
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