Nail varnish bottle closure removal torque and capping check

Barry M Cosmetics Ltd is a leading British colour cosmetics brand, offering a comprehensive range of products for face, eyes, lips and nails. Their heritage began in 1982, by recognising the gap in the market for fashionable, on trend, vibrant colour choices in the cosmetics industry.

The company’s reputation centres not only on drama and high quality, but also a strict policy to be cruelty-free in the testing of finished products and ingredients, in-house or within their supply chain. The brand produces not only a vast array of nail paint colours and special effects, but also in a range of finishes.

With such challenging criteria for the cosmetics chemist in terms of product style and formulation ethics, the performance of the product in use must also be assured.

The cap's closure torque should be applied at point of production to preclude leakage during packaging or transportation, without weakening or breaking the bottle neck. The consumer should also be able to unscrew the cap with ease.

The company required a quick, reliable and repeatable test method to check the capping equipment of their nail paint range.


Mecmesin supplied a Tornado digital torque tester of 3 N.m capacity, which is a complete, portable, benchtop instrument. The bottle manufacturer recommends a removal torque in the range of 55 – 65 as a quality check for in-specification application torques.

Barry M’s production department takes six examples from the capping machine at regular intervals and measures the peak torque value to remove the closure. A clear/fail indicator LED and audible alarm enable a fast, consistent assessment of the production equipment.

Additionally, Tornado’s versatile mounting table accommodates various container designs and has an integrated drip tray. Its casing is resistant to spillage, and the control panel/display also sealed and wipe-clean – ideal for testing liquid cosmetic products.

Barry M can therefore continue to innovate, with further confidence that their customers will receive their products intact, ready to apply with ease.


  • Tornado 3 N.m digital torque tester
  • Standard accessories – adjustable mounting table and container holder pegs


“The Mecmesin system has helped us deliver a better product to our customers with less breakages and leaks. The Tornado is used every 2 hours to ensure the torque of the nail varnish caps are within working range.”

— Gregorio Suarez, Quality Control and Production Manager, Barry M Cosmetics Ltd.

See also

Cosmetic packaging pull-off test

A bench-top testing system was required to repeatably test the pull-off force on a variety of cosmetic containers. The system needed to allow a relatively high volume of containers to be tested with the minimum level of training required for users. Mecmesin's solution avoided the risk of damaging the loadcell by excessive torque on tightening the collet grip, and the lipstick barrel was first inserted in the grip and then connected to the gauge by a flexible chain-link.

Food packaging made from thermoformed plastics and intended for freezing, requires testing to ensure optimum functionality when closing and sealing the container. The closing effort of the lid is measured by using a motorised force tester controlled by software together with a custom-designed fixture to hold standard-sized ice cream tubs. In addition the ‘top-load’ crush strength of the container itself can also be tested on the same machine to guarantee it is rigid enough to avoid buckling and spillage when the lid is applied.

Mecmesin develops Combi Cork-i Extraction Tester for leading Scottish whisky

To improve the quality and storage of a premium product, the R&D team at a leading Scottish whisky maker needed to optimise the design of their bottle stoppers. They decided that the strength and performance of their reusable stoppers could be ensured by systematic testing of the characteristics of both portions of the stoppers. Working closely with the R&D team, Mecmesin developed the Combi Cork-i Extraction Tester, an innovative multi-function cork extraction testing system that tests both phases of de-corking synchronously.

  • Isabel Thomas
  • Product Info
  • English
  • Created 06 May 2019
  • Modified 11 Jun 2019
  • Hits 730