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  • 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 – Melted Chocolate Application Note

Chocolate rheology according to the IOCCC standard


This measuring Method enables to find Plastic Viscosity and Yield Value on chocolate samples at 40°C, according IOCCC standard.

RM200Plus – Method

Pre-shearing of 15 minutes of the sample at 40°C including in the C or DIN11 cup, installed into the Peltier Air-Air temperature control unit; this system don’t use water or liquid circulation, just ambient air.

The IOCCC 1973 standard advice to realise a Step by Step ramp from 5 to 50s-1 at 40°C +/- 0.1°C.

The reached curve is then fitted with CASSON or CHOCOLATE model, in order to calculate the following parameters: Yield Value in Pa and Plastic Viscosity in Pa.s that are the characteristics of plastic shear-thinning fluids, with yield value.


  • Example of measurement on milk chocolate:
  • T °C = 39,9 °C
  • Yield Value = 9,3 Pa
  • Plastic Viscosity (CASSON) = 1,42 Pa.s
  • Correlation factor: R = 1,000

For more information on the Lamy Rheology RM200Plus please click here