Page 53 - QRedition5.0 062021

Quality Requirements Edition 5.0 European Enamel Association

7.13.4 Remarks

The thickness of the sheet material and/or the panel construction must ensure that distortion cannot be imposed through manual force.

Articles must be equipped with sufficient protection against corrosion at the back side.

Finished flat architectural panels may not deviate more than 0.75 % in flatness with respect to the longest side and diagonal of the article, and must meet the requirements of
the manufacturer with regard to sheet thickness, sheet quality, construction and technical design of the article. The inspection frequency for this additional requirement during
production is at least 1 x per month. Panels are measured in the position in which they will be installed.

Possible firing marks at the back side of the non-glued panels must be retouched in order to prevent corrosion. The inspection frequency for this additional requirement during
production is at least 1 x a day.

Appearance (colour, structure and brightness of the products) must be equal to the appearance of an enamelled sample that has been approved of by the interested
partners. The inspection frequency for this additional requirement during production is 100 % of the material.

The enamelled surface shall be visually examined either in natural light or in artificial daylight D 65 (see EN-ISO-105-J03). The surface shall be examined from a minimum distance
of 1.5 m, or at the distance at which the fixed panel would normally be viewed, whichever is the greater. The enamelled surface exposed to the atmosphere shall be free from
defects liable to change the general appearance of the panel.

Resistance to graffiti: After eight days of ageing, inks, varnishes, lacquers or paints, shall be easily removable with suitable solvents without any visible gloss or colour change
in the enamel surface.

© EEA2020 page 53
EEA2020