NF EN 15771

Vitreous and porcelain enamels - Determination of surface scratch hardness according to the Mohs scale

Le présent document spécifie une méthode d'essai permettant de déterminer, sur l'échelle de Mohs, la dureté superficielle des émaux vitrifiés en étirant manuellement sur leur surface certains minéraux présentant une dureté définie sur cette même échelle.

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