FIELD: glass working. SUBSTANCE: etching solution containing hydrofluoric acid, sulfuric acid, glycerol has additionally acetone and ethylene glycol at the following ratio of components, wt.-%: hydrofluoric acid 21-22; sulfuric acid 51.5-53; glycerol 10-11.5; acetone 3.2-4, and ethylene glycol 11.5-12. EFFECT: high quality of worked surface. 1 tbl
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