DIN 68861-4:2011-01

This standard specifies a method for the evaluation of the scratch resistance of furniture surfaces and applies to the flat surfaces of all products with surface treatment, independent of material. It does not apply for treated surfaces made of leather or textiles. The test shall generally be carried out on test pieces which are of the same material with identical surface treatment of which finished furniture consists and are large enough to correspond with the test requirements. The test shall be carried out on unused surfaces. The standard specifies the most important parameters for the test/assessment and the conditions for classification of the results. During the test in accordance with this standard, scratches are produced with different weight forces which are applied to the test field with a hemispherical diamond point. The scratch resistance of the test piece is the smallest weight force which leaves a continuous scratch on the test field. The average of the three test pieces is compared with given value ranges of resistance groups and undergoes a classification. The scratch resistance of the furniture surface to be assessed is declared as resistance group. Scratches can also be glossy spots. The Committee responsible for this standard is NA 042-05-08 GA "Gemeinschaftsarbeitsausschuss NHM/NAB: SpA zu CEN/TC 207/WG 7 Möbeloberflächen" ("Joint Working Committee NHM/NAB: Mirror Committee of CEN/TC 207/WG Furniture surfaces") at DIN.