International Organization for Standardization

Cork - Cork stoppers for still wines - Mechanical and physical specifications - First Edition
 N 16420

Annotation

This International Standard defines, for each type of ready-to-use, cylindrical cork stopper for still wines (colmated or non-colmated natural cork stoppers, agglomerate cork stoppers, 1 + 1 stoppers), a set of specifications corresponding to different tested parameters, a list of which is given below:

- dimensions;

- mass (for 1+1 stoppers only);

- mass and apparent density (for agglomerate cork stoppers only);

- moisture content;

- dimensional recovery after compression;

- extraction force;

- liquid tightness;

- dust content.

For all parameters, this set of specifications comprises:

- a proposal for the number of stoppers to be tested (incremental sample);

- an acceptable quality level;

and, for certain parameters:

- nominal value or values;

- specification limits (or "tolerances").

For cork stoppers for still wines, and for certain parameters, the concept of a range is introduced, with 3 decreasing levels of requirements: