FIELD: construction.
SUBSTANCE: pickling solution includes, wt %: HF 3.5-4.0; H2SO4 73.5-74.5; H2O 20.0-22.0; K2Cr2O7 1.0-1.5.
EFFECT: improved glass surface processing quality.
1 tbl
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| ETCHING SOLUTION | 1991 |
|
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RU2417191C1 |
