ISO 10581:2011 specifies the characteristics of homogeneous floor coverings, based on poly(vinyl chloride), supplied in either tile or roll form. Products may contain a transparent, non-PVC factory finish. To encourage the consumer to make an informed choice, ISO 10581:2011 includes a classification system (see ISO 10874) based on intensity of use, which shows where these floor coverings should give satisfactory service. ISO 10581:2011 also specifies requirements for marking.