Measuring the extraction force of cylindrical corks from bottles.

Test Summary

This part of the ISO 9727 standard concerns the force needed to extract a cylindrical cork from a wine bottle. Samples of cork stoppers are selected in accordance with ISO 2859-1, ISO 3951 and ISO 4707. After conditioning for 24 hours, the corks are fitted into filled wine bottles then stored horizontally for eight days, after which the maximum extraction force is measured.

Test Procedure

Wine bottles are filled to the correct volume with a solution of diluted alcohol and the cork fitted. After five minutes the bottle is laid horizontally then stored for eight days before testing. A corkscrew is inserted into the cork, the bottle is clamped in the upright position, and the maximum force needed to extract the cork is measured.

Test Apparatus

• Force testing stand
• Force gauge or loadcell compatible with the force testing stand
• Apparatus for clamping the bottle vertically on the force testing stand
• Corkscrew of defined dimensions

Preparation

Corks are conditioned prior to testing for 24 hours at 23 ± 2°C and 50 ± 5%. RH.

Method

1. Fill clean bottles to the correct level with a 10% solution of ethanol, and insert the cork.
2. After five minutes lay the bottle horizontally and store for eight days at 20 ± 2° C and humidity of 65 ± 5% RH.
3. Insert the corkscrew into the cork stopper until 3 mm can be seen outside the stopper.
4. Clamp the bottle vertically onto the test stand, and connect the corkscrew to the load measuring cell.
5. Withdraw the cork at a speed of 30 cm per minute while recording the extraction force.
6. Record the maximum extraction force, and report in decanewtons (daN).

Report

The test report shall contain:

All the information necessary for the complete identification of the sample; Reference to the method used; Results obtained, including average values and deviations; All operating details either not specified in the standards or regarded as optional; Any occurrence that may have affected the result; The number of test pieces used.

Mecmesin Test Equipment Required for ISO 9727

• Motorised test stand – MultiTest 2.5-dV
• Advanced Force Gauge (AFG)

Please refer to the latest official ISO 9729 standard for more detailed information. This overview is intended to provide a basic understanding of the test procedure and suitable equipment to meet the standard.

“Mecmesin test equipment is used for ensuring compliance with a wide range of test standards e.g. ASTM, BSI, DIN, ISO and MIL. For more information visit our Knowledge Centre to see examples of standards classified by test application www.mecmesin.com/knowledge-centre-test-types”

For a quote or demo please contact us on +44 (0) 1403 799979 or email This email address is being protected from spambots. You need JavaScript enabled to view it.