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Nostra qualis melius internation Strandard
| Test items | Nostra factory criterium | Internationalis / indiritio criterium |
| plumbum duritiam | ≥2h | ≥f |
| test Test | ≤3t | ≤5t |
| inpulsa test | ≥9j | ≥9j |
| Test mek | ≥100 | ≥100 |
| scalpere test | ≥1500g | / |
| (V% HCL) uvam test | ≥24h | ≥24h |
| (V% Naoh) alkali test | ≥24h | ≥24h |
| sal imbre test | ≥1000h | ≥480h |
| (Qua) Kuva test | ≥1000h | ≥600h |