Page 58 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.15.3 Quality requirements

Test method Requirement Remarks Frequency
4.3 thickness enamel coating max. 0.20 mm S4/AQL 6.5
(in coil production 1 x per 100 m )
2
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 may be conform in production 1 x a day
to EN ISO 28764
4.17 gloss degree 2-20 measuring angle 60° S4/AQL 6.5
2
(in coil production 1 x per 100 m )
4.26 abrasion resistance max. 0.1 gram conform to ASTM C 501 when taking into production a sig.diff.
sandpaper S33/1kg/1000 rotations enamel recipe (exclusive colour-oxides),
ISO 6370-1 and ISO 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

7.15.4 Remarks

The surface of the chalkboards must be suitable and easy to write on. Removal of writing should go smoothly with a dry felt eraser or latex sponge.

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