International Organization for Standardization

Cork - Cork stoppers for still wine - Sampling plan for the quality control of cork stoppers - First Edition
 N 17727

Annotation

This International Standard describes the quality control sampling plans for the receipt and shipping of ready-to-use, cylindrical stoppers (flush with cork mouth finish) in semi-worked or finished cork used for still wines.

These plans do not apply to controls made during production.

This sampling plan applies to the following parameters, for which a standardized analysis method is available. These are the parameters which are applicable to:

- physical tests: dimensions, mass, and apparent density for agglomerate cork stoppers, moisture content, dimensional recovery after compression, extraction force, liquid tightness, and dust content [see ISO 9727 (all parts)];

- chemical tests: analysis of oxidizing residues (see ISO 21128);

- microbiological tests: enumeration of colony-forming units of years, moulds, and bacteria capable of growth in an alcoholic medium (see ISO 10718);

- sensory analysis (see ISO 22308);

- the analysis of releasable 2,4,6-trichloronisole (TCA) (see ISO 20752).

Type tests and validation tests are not included in this International Standard (for example global migration).

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