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Cosmetic APPLICATION Complete texture of styling gel

CRT (Compression-Relaxation-Traction) Tests measure the Consistency, Elasticity and Adhesiveness of a product. It enables relevant parameters to be selected to defi ne a product’s texture, and which will be related to its hardness, cohesion, and adhesiveness or free-running nature.

    Cosmetic APPLICATION

    Probe

    25 mm Cylinder

    Software

    TEX’AN Drive

    Temperature recording

    Pt100

    Compression speed

    1 mm/s

    Compression distance

    10 mm

    Relaxation time

    20 sec

    Traction speed

    2 mm/s

Method

A test of 3 consecutive phases is carried out: Compression followed by a Relaxation phase without movement where the reaction force (elastic thrust) of the sample is measured, then the probe is lifted while the fl uid’s Traction force is measured, indicating its adhesiveness.

Results

The 3 phases are identifi ed on the curve Force =f(time) The calculated parameters are:

  • • Fmax = 253g which is the product’s consistency in terms of defi ned compression (probe and distance)
  • • % Relaxation = 51% which is inversely proportional to the product’s elasticity
  • • Fmin = -70 g which refl ects the traction or adhesion force of the product on the probe when it is brought out of the sample.

It will therefore be easy to compare and rank different textures of products according to their response curve and the quantifi ed values of these parameters.

Do not hesitate to get in touch with us for more information:
Phone: +33 (0)4 78 08 54 06 / contact@lamyrheology.com

Cosmetic APPLICATION

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Lamy Rheology is the first French manufacturer of measuring
instruments for laboratories , research and industry.
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