Tel: 01582 704807   |    Email:   |   Signup to our newsletter
  • Measure, analyse, control


    Measure, analyse, control

    The systems we supply are used at all stages in research, development and manufacturing

    Our systems enable you to measure, analyse and control a broad range of properties and characteristics across a wide range of sample types.

Rheometer, Rheology, RM200 PLUS

RM200 PLUS – Shampoo Application Note

Rheology of “Baby” and “Adult” Shampoo using the RM200 PLUS


Cosmetic products have different rheological behaviours depending on how they were formulated and on their use.

A comparison of two different shampoos, i.e. Baby and Adult as in this example, is characteristic of this.


After quickly warming of 1 ml of sample at 23°C with RM200 CP 4000 PLUS Peltier a flow curve from 0.5 to 200 s-1 is created from the software. The resulting flow curve shows the influence of shear rate on a product’s viscosity.

When the shear stress curve (Tau = f(D)) is a straight line through 0, the product is Newtonian and if the rheological profile is a curve, viscosity decreases under the effect of speed, the product is shear-thinning.


These two samples clearly show that “Baby” shampoo keeps the same viscosity whatever shearing it suffers, while “Adult” shampoo comes out of the bottle with a texture that is 4 times more viscous, becoming more fluid as soon as it is used, up to a viscosity that is 20 times lower than “Baby” shampoo, which will obviously be less requested.

More information

More information on the Lamy Rheology RM200 PLUS here.