The development in viscosity ofMilk72 and 95 is shown in Fig. 2.Viscosity of both milks was constant between 2.0 and 2.5 mPa s during the first 9 weeks of storage. After 10 weeks storage, the onset of gelation caused the viscosity of Milk72 to increase and it further increased rapidly in the following week up to 13.6 2.6 mPa s. The viscosity of Milk95 did not change during the applied storage period. A similar observed increase in viscosity with the onset of gelation has been reported previously by Kohlmann et al. (1991) and Kelly and Foley (1997).