Appearance: Colorless to greenish glassy blocks Total content: more than 99% /98.5% /99% Molar ratio: 2.0-2.2;2.3-2.4 / 3.0-3.2;3.35-3.45 / 3.0-3.2;3.35-3.45 Na2O: 32%;29% / 24%;23% / 24%;23% SiO2: 67%;69% / 74%;75% / 74%;75% Fe: less than 0.03% / 0.025% / 0.018% Packing: Jumbo PP bag or bulk in container
