However, the mechanical strength of tablets also needs to be high
enough to be handled and to be stable under processing. In the
freeze casting process, the porosity of produced tablets is linked
reciprocal to their tensile strength. A tablet owning a higher porosity
may have a better dissolution rate, however, a high porous
structure also induces a lower mechanical stability and vice versa.
In order to get the balance of both the tensile strength and the
porosity (or the dissolution/dispersal rate), a binder which is highly
soluble in the dispersal medium is strongly recommended