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Item | Index | ||||
Model | Top Grade | First Grade | Qualified Product | ||
Zinc Oxide (as ZnO) % ≥ | 99.7 | 99.5 | 99.4 | ||
Metals (as dry)% ≤ | No | No | 0.008 | ||
Lead Oxide (as Pb) % ≤ | 0.037 | 0.05 | 0.14 | ||
Manganese Oxide (as Mn) % ≤ | 0.0001 | 0.0001 | 0.0003 | ||
Copper Oxide (as Cu)% ≤ | 0.0002 | 0.0004 | 0.00007 | ||
Insoluble Matter in Hcl % ≤ | 0.006 | 0.008 | 0.05 | ||
Loss on ignition % ≤ | 0.20 | 0.20 | 0.20 | ||
Residue on sieve % ≤ | 0.10 | 0.15 | 0.20 | ||
Water soluble matter% ≤ | 0.10 | 0.10 | 0.15 | ||
Volatile matter on 105°C% ≤ | 0.30 | 0.4 | 0.5 | ||









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