RM200 Plus – Melted Chocolate Application Note

Chocolate rheology according to the IOCCC standard

Use

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.

Results

• 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