Page 57 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.15. QUALITY REQUIREMENTS FOR PORCELAIN AND VITREOUS ENAMELLED CHALKBOARDS

7.15.1 Application area

This norm is applicable for enamelled chalkboards of which the basic material consists of steel or laminated steel.
GENERAL: THE PRODUCTS MEANT FROM THIS GROUP NEED TO MEET THE REQUIREMENTS AS DESCRIBED IN EN ISO 28762:
“Vitreous and porcelain enamels – Enamel coatings applied to steel for writing surface – Specification“

7.15.2 Test methods

Item Name Comparable standards
4.3 measurement of the thickness of the enamel coating EN ISO 2178, EN ISO 2360, EN ISO 1463
4.4 determination of the resistance to chemical corrosion by citric acid
or other acids at room temperature EN ISO 28706-1/9
4.9 determination of the resistance to impact ISO 4532

4.10 determination of the adherence of the enamel to the substrate EN 10209 Annex C
4.17 determination of gloss EN ISO 2813, ASTM C246
4.26 determination of abrasion resistance ASTM C501, ISO 6370-1 and ISO 6370-2
4.28 determination of the quality of steel for enamelling EN 10209 for cold rolled steel and EN 10025 or EN 10111 for hot rolled steel
or EN 10149 for HSLA steels
and EN 10222-1 for steel forgings for pressure applications

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