Page 52 - 20250602 EEA QM Edition 6.0

Quality Requirements Edition 6.0 European Enamel Association

7.13.3 Quality requirements

Test method Requirement Remarks Frequency
4.2 material thickness min. 0.75 mm, not valid for laminated panels determination during design
4.3 thickness enamel coating max. 0.40 mm not applicable if covered with several colour S4/AQL 6.5
layers in order to achieve special (when coil production,1 x per 100 m )
2
decorative effects
4.4 cold citric acid min. class A when taking into production a sig.diff.
enamel recipe, but at least 1 x per year
2
4.5 boiling citric acid max. weight loss: 18.5 g/m per 2.5 hours when taking into production a sig.diff.
enamel recipe, but at least 1 x a year
4.9 impact resistance at 20 N no damage > 2.0 mm diameter after 24h when taking into production a sig.diff.
enamel recipe, but at least 1 x a year

4.10 adherence min. 2 on test sheets, conform to EN ISO 28764 in production 1 x a day
2
4.12 porosity max. 10 defects per m in production min. 1 %
or:
2
4.13 determination of defects max. 10 defects per m in accordance with EN ISO 8289 method B in production min. 1 %
or max. 5 defects per m in accordance with EN ISO 8289 method A in production min. 1 %
2
4.18 scratch resistance min. 7 N when taking into production a sig.diff.
min. 4 N for metallic finishes and silk-screened enamel recipe (excluding colour oxides),
finishes but at least 1 x a year
4.19 colour difference even and smooth surface, evaluated equal to the Colour difference possibly measured with a In production 100%
appearance of an approved enamelled sample spectrometer and tolerances previously
agreed by interested partners
4.26 abrasion resistance max. 0.1 gram in accordance with ASTM C501 sandpaper when taking into production a sig.diff.
S33/1kg/1000 rotations enamel recipe (excluding colour oxides)
EN ISO 6370-1 and EN ISO 6370-2 but at least 1 x a year

4.28 steel quality in accordance with norm EN 10209 is recommended: determination during design
DC01EK / DC04EK / DC04ED

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