80 u00b0 c 00 15 00 temp 30 u00b0 c idle temperature 50 u00b0 c end of test 20 mintime between readings 4s______________________________________ fig2 is a copy of the resultant plots of viscosity left hand axis against time for samples of wpc which had undergone high or low heat processing as the sample mixture was heated to and held at around 80 u00b0 c the viscosity of the sample mixture rose and reached a first plateau the viscosity rose and reached another plateau as the sample mixture was cooled it is apparent that the test readily distinguishes the different processing histories of the two wpc samples the dual lines for viscosity for each wpc type indicate the test results for two different samples from the same source it can be seen that the results were highly reproducible into a canister of an rva apparatus was placed distilled water and onto the surface of the water was placed an amount of smp to provide 4 50 g protein in 28 5 g solution the sample mixture was shaken vigorously for 30 s to form a slurry a stirrer was placed into the canister which was then placed into the rva apparatus as shown in fig1 the rva apparatus commenced heating and initial rapid stirring of the sample mixture at 1000 rpm to place the smp into homogeneous suspension the microprocessor controlled gradual heating of the sample mixture ramping up to about 90 u00b0 c held at that temperature and.