Each sample was available in unfiltered and
originally filtered form to compare the honeys directly. 50e100 g of
each sample were rapidly warmed to 45 C (5e10 min), mixed
thoroughly and filtered out with Schott filters (Duran, Mainz, Germany),
pore size < 40 mm, under the pressure of 0.3e0.4 MPa. Afterwards,
the honey was cooled down.