the MWB samples dried using FD were higher than those of
MWB samples dried using MFD. This might be due to the fact that
more ions and soluble components in the samples may be transferred
from the inner layer to the surface of the dried samples as
a result of an entrainment effect (Sunderland, 1980) caused by relatively
high drying rate during MFD compared to the samples dried
by FD. FD samples were harder because all ions and soluble components
remained in the original positions in the dried portion of
the samples due to a relatively low drying rate. However, the hardness
values of the HWB samples dried using FD were lower than
those of HWB samples dried by using MFD method. This may be
due to larger porous structure formed in the samples which results
in a relatively slower drying rate during FD and thus gives lower
hardness values than HWB samples dried by MFD in which a smaller
porous structure is caused by shrinkage, leading to harder texture
in those samples.
As shown in Fig. 11, SR values of MFD samples were found to be
slightly lower than those of FD samples. But, there no noticeable
difference in SR values was observed between HWB and MWB
samples dried by FD method. However, there was a small difference
in SR values for the two MFD samples.