ISO 9727:1991

Specifies the reference methods for determining the following characteristics of theses stoppers: dimensions; deviations from parallelism of bases and from perpendicularity of sides and bases; apparent density; moisture content,; behaviour under compression; extraction and penetration strengths; absorption; and capillarity. Sealing behaviour will be covered later. Contains sampling, reagents, apparatur, test conditions, various tests and test report.