| 摘要 |
1532139 Enamel for opal glass CORNING GLASS WORKS 1 June 1977 [4 June 1976] 23103/77 Heading C1M An enamel composition, which is essentially free of alkali metal oxides (other than Li 2 O), comprises with optional additions of 0-4% CdO, 0-3% ZnO, 0-3% A1 2 0 3 , 0-3% Y 2 0 3 , 0-4% Ta 2 O 5 , 0-2% SnO and known ceramic pigments. The composition may be used on an opal glass comprising with optional additions of 0-4% K 2 0, 0-2À5% SrO, 0-1% Li 2 O and minor amounts of As 2 O 3 and CaO. |
