As explained in Forny et al. [5], capillary penetration is improved with increasing powder layer porosity and particle diameter. Secondly, the agglomerated powders were less likely to form lumps; the proposed mechanism responsible is that the granules have better permeability to water, thus when water penetrates the granules it helps disperse them
more easily; this also may allow for faster dissolution of individual primary particles due to an increase in contact area between individual particles and water.