Delivering Measurement Solutions


Hair Tresses —  All-in-one Tress Testing Solution is a multi-functional tress testing instrument designed with the user in mind! showcases ergonomic design elements, integrated controls for a minimal footprint and our newly designed application-led software – fibra.

The instrument can be loaded with multiple accessories; combing, 3-point bend, hair friction, curl compression, stress and tensile, expertly designed to make changing between samples and test methods quick and easy for the user, improving testing efficiency. brochure

Using the following measurement methods, enables you to generate globally-respected data to support your research and development objectives:

Combing –

The user-centric design of this accessory enables rapid tress mounting/dismounting (to change samples or re-wet samples during testing), flexibility for a range of comb sizes and thicknesses and a magnetic clamp plate to hold tresses within the comb during testing.

Combing measurements provide invaluable information about the conditioning performance of a product, and can be performed on both wet and dry tresses. Hair combing properties correlate well with consumer attributes e.g. “ease of combing”, “manageability” or “detangling”.

3-Point Bend –

This ergonomically designed accessory measures flexural properties of hair tresses, and is most commonly used for styling claims such as “hold”, “stiffness” or “feel” in the claims packages for styling polymers, hair gels and hair sprays. This can be used in the same vertical orientation as the combing accessory, reducing the time spent changing between accessories and testing methods.

Friction –

The friction accessory (used in the horizontal orientation) combines a rubber probe mimicking hand/skin compliance and texture properties, and a base plate with mechanism for secure and quick hair clamping. New design features include a detachable platen for rapid tress mounting/dismounting, simplified indexing of the probe position and an integrated auto-lift mechanism, removing the need for a compressed air supply.

Hair friction properties correlate well with consumer attributes such as “smoothness” or “surface damage” (heat, environmental, bleaching, repeated styling).

Curl compression –

The accessory was developed to measure the compression properties of circular hair curls formed from hair tresses as a technical test, predictive of consumer hair curl sensory feel.

The two-part accessory consists of a curl clamp barrel and curl clamp fork. The barrel slots into a curl rod around which curls are formed, clamped with the fork and then removed securely, forming consistent, repeatable curls with minimal handling. The pre-formed curls, held by the accessory, are mounted onto a load cell and compressed by the upward movement of a compression plate. The force required to compress and decompress the curl is measured by the load cell.

The hair curl compression method is perfect for “softness” or “curl retention” claims, for styling products such as hair gels, mousses, hair sprays, pomades as well as wash and care products.

Stress –

The accessory has been designed to offer dimensional and tensile testing of single fibres on the system. The accessory is fitted in the horizontal orientation of the, and various fibre types can be measured for diameter and tensile properties, including single hair, textile or natural fibres.

The accessory combines a laser scanning micrometer module (LSM500) which records the fibre dimensions to enable the calculation of uniaxial normal stress data.  Samples are easily loaded into two pockets, one fixed on a moving platform and one attached to a load cell which measures the force being applied to the sample. The fibre can be extended to either a specific extension or to failure in order to obtain tensile parameters such as the elastic modulus, break stress and break strain.

Test methods in the Dia-Stron fibra. software include single tensile deformation, hysteresis, and cyclic, with stress relaxation to be released soon. Fibre samples can be mounted using brass crimps, plastic tabs, or plastic clips, dependant on the fibre type, with sample pockets to be specified by the customer at point of order.

Testing data on hair fibres can be used to substantiate “strengthening”, “hydrating” and “damage repair” claims.

Tensile –

The accessory operates in the same way as the accessory, without the additional dimensional capability. The tensile properties of fibre samples can be measured in force but not normalised with fibre dimensions, as there is no conversion to stress data.

Comparisons on the same fibre samples before and after treatment can also be made with the accessory, using a non-destructive tensile method.

This multi-use capability makes the most cost-effective, innovative and efficient solution for all your hair tress testing needs.

Note: the MTT175 tress testing instrument has been discontinued, however service and maintenance support are available for the life of the instrument. All accessories for the MTT175 will be available until further notice, however the volume and product tack/adhesion accessories will not be re-developed for the