shaped, small in size (~5 μm) and randomly dispersed in the foam cell
walls. When using large sugar particles, the pore shape is very similar,
however the micropores appear to be located at the grain boundaries
with orientations mainly perpendicular to the compaction direction.
Moreover, a number of interconnected micropores appear as intergranular
cracks. Therefore, in cases of large sugar particles, the microporosity
is anisotropic