Page 62 - 20250411 Final Draft EEA QM Edition 6.0

Quality Requirements Edition 6.0 European Enamel Association

7.17.3 Quality requirements

Test method Requirement Remarks Frequency
4.3 thickness enamel coating max. 0.25 mm S4/AQL 6.5
(in coil production 1 x per 100 m )
2
4.4 cold citric acid class A when taking into production a sig.diff.
enamel recipe, but at least 1 x per year
4.9 impact resistance at 20 N no damages > 2.0 mm diameter after 24 hours when taking into production a sig.diff.
enamel recipe, but at least 1 x per year

4.10 adherence min. 3 on test sheets, conform to EN ISO 28764 in production 1 x a day

4.17 gloss min. 35 measuring angle 60° S4/AQL 6.5
2
(in coil production 1 x per 100 m )
4.18 scratch resistance min. 7 N when taking into production a sig.diff.
min. 4 N for metallic finishes and silk-screened finishes enamel recipe, but at least 1 x per month
4.19 colour difference after ΔE* < 0,5 after a thorough wet cleaning, the surface when taking into production a sig.diff.
cleaning contamination or colour fading under enamel recipe, but at least 1 x per year
influence of the marker pigment should not
exceed ΔE* = 0,5.
4.26 abrasion resistance max. 0.1 gram conform to ASTM C501 when taking into production a sig.diff.
sandpaper S33/1kg/1000 rotations EN enamel recipe (excluding colour oxides),
ISO 6370-1 and 6370-2 but at least 1 x per year
4.28 steel quality in accordance with norm EN 10209 is recommended: determination during design
DC01EK / DC04EK / DC04ED

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