Washability according to wet abrasion resistance
DIN EN 13300 is a qualification standard for interior paints. Wet abrasion resistance, opacity, degree of gloss and grain size are determined using standardized test methods and clearly divided into classes. This allows for a quick overview of the quality and appearance of the interior wall paint.
Why a standard for the evaluation of emulsion paints? Standards are absolutely necessary to make the qualities of coating materials such as interior paints comparable. Interior colors can only be compared independently of the manufacturer if the criteria for a test are well defined. In addition, the binding nature of the standard guarantees a firmly defined, controlled and verifiable quality. The European standard DIN EN 13 300 regulates the criteria relating to the quality and appearance of a coating material. Quality criteria include wet scuff resistance and hiding power (or contrast ratio). In the standard, the appearance is defined by the gloss and the maximum grain size. wet scuff resistance Wet scuff resistance is a measure of the mechanical abrasion of interior paints. This parameter indicates, for example, whether the surface of a wall can be cleaned without a noticeable change in the surface. The measurement criteria are defined and uniform for each test (» DIN EN ISO 11 998). Overall, interior paints are divided into five wet abrasion classes, class 1 corresponding to the best resistance to wet abrasion and class 5 the lowest.
Wet abrasion resistance Class 1 (very high)
Cleaning the paint with water and a natural bristle brush. Possibility of adding a neutral or hygienic cleaner. Suitable for heavily used interior surfaces, e.g. entrances to houses, kitchens, stairways and public buildings.
Wet abrasion resistance Class 2 (according to DIN 53778)
Cleaning the paint with water and a natural bristle brush. Possibility of adding a neutral or hygienic cleaner. Suitable for heavily used interior surfaces, e.g. children's rooms or bathrooms.
Wet abrasion resistance Class 3 (according to DIN 53778)
Cleaning the paint with water and a cloth or sponge. Possibility of adding a neutral detergent. Suitable for interior walls and ceilings that are not subject to repeated friction.