The rheological properties of seven varieties of Polish honeys, among them five nectar varieties (acacia, buckwheat, linden, multifloral and rape), a nectar-honeydew and a honeydew variety, were investigated over a temperature range of 10-40 degrees C. The honeys had a water content of 14.7-18.0 g/100 g. The viscosity curves of the samples were obtained using a rotational rheometer. All the honeys exhibited Newtonian behaviour. Their viscosity varied between 1.76 and 252.6 Pa s according to the kind of honey and the temperature of measurement. The temperature dependence of viscosity was described using the Arrhenius equation and the Williams-Landel-Ferry (WLF) equation. The values of flow activation energy varied between 92.34 and 105.25 kJ/mol, those of glass viscosity (eta(G)) ranged from 1.88 x 10(11) to 2.86 x 10(11), and the values of glass transition temperature (T-G) were of 220.34-228.39 K. (c) 2005 Elsevier Ltd. All rights reserved.