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Onze kwaliteit beter dan internation Strandard
| testitems | Ons fabriekscriterium | internationaal /indirstelijk criterium |
| potloodhardheid | ≥2H | ≥F |
| buigtest | ≤3t | ≤5t |
| schoktest | ≥9J | ≥9J |
| MEK -test | ≥100 | ≥100 |
| krastest | ≥1500 g | / |
| (5%HCl) Zure test | ≥24H | ≥24H |
| (5%NaOH) Alkali -test | ≥24H | ≥24H |
| zoutspraytest | ≥1000h | ≥480h |
| (Quva) Kuva -test | ≥1000h | ≥600h |