ISO INTERNATIONAL STANDARD 23997 First edition 2007-12-15 Resilient floor coverings Determination of mass per unit area Revetements de sol résilients Détermination de la masse surfacique Reference number ISO 23997:2007(E) @ ISO 2007 by IHS under lic ted without license from IHS Not for Resale ISO 23997:2007(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through IsO non-governmental, in liaison with isO, also take part in the work. isO collaborates closely with the InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 23997 was prepared by Technical Committee ISO/TC 219, Floor coverings ii aadizao No reproductic neworkingmitedwithout licenefrmH Not fr esale INTERNATIONALSTANDARD ISO 23997:2007(E) Resilient floor coverings Determination of mass per unit area 1 Scope This International Standard describes a method for determining the mass per unit area of a resilient floor covering. Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 mass per unit area quotient of mass and area NOTE Mass per unit area is expressed in grams per square metre. 3 Principle weighed and, from this, the mass per unit area of the floor covering is calculated. 4 Apparatus 4.1 Balance, capable of weighing a specimen to the nearest 10 mg 4.2 Calliper gauge, capable of measuring the size of the specimen to the nearest O,05 mm. Atmosphere for conditioning and testing Condition the specimen at a temperature of 23 ± 2 °C and a relative humidity of 50 ± 5 % for a minimum of 24 h. Maintain these conditions when carrying out the test. 6 Sampling and selection of specimens Take a representative sample from the available material. Take five specimens, at equal distances from the sample, the distance between the outer edge of the sample and the nearest edge of the specimen being at least 100 mm, either square or round of at least 0,01 m? in area, or from individual tiles. If necessary, clean the edges of the specimen. Full tiles may also be used. Copyright International Oorganization for Standardizallon'ghts reserved from IHS Not for Resale ISO 23997:2007(E) 7 Test procedure specimen separately and record the mass to the nearest 10 mg. 8 Calculation and expression of results Calculate the mass per unit area, in grams per square metre, using the following formula m A where mi is the mass of the specimen, in grams; A is the area of the specimen, in square metres. For results up to and equal to 1 000 g/m?, express to the nearest 5 g/m2. For results over 1 000 g/m2, express to the nearest 10 g/m?. Calculate the mean value for the mass per unit area for the five specimens, expressed to the nearest gram. 9 Precision statement A round-robin test will be conducted to determine the precision of this method 10 Test report The test report shall contain the following information: a) a statement that the tests were performed in accordance with this International Standard (Iso 23997); b) complete identification of the product tested, including type, source, colour and manufacturer's reference numbers; C)[ previous history of the sample; d) , the mean value for the mass per unit area; e) any deviation from this International