*1.5.6.1 Bulk density (Db)*

It is the proportion of the powder's total mass to its bulk volume. The weight of the powder was measured by pouring it into a measuring cylinder, and the volume was recorded. It is calculated using a formula and expressed in gm/ml.

$$\mathbf{D}\_{\mathbf{b}} = \mathbf{M} / \mathbf{V}\_{\mathbf{0}}.\tag{1}$$

where M is the mass of powder, and V0 is the Bulk volume of the powder.
