FIELD: protection of pipes. SUBSTANCE: proposed frit contains (mass % ): silicium oxide 50-65, boron oxide 0.5-10, titanium oxide 0.5-6.2, sodium oxide+potassium oxide+lithium oxide 15-25, calcium oxide+ magnesium oxide 2-10, zirconium oxide 4-12, nickel oxide 1-2.5, cobalt oxide 0.5-1, manganese oxide 2-10. EFFECT: improves quality of enamel. 2 tbl
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Authors
Dates
1995-05-27—Published
1992-07-15—Filed