*1.5.6.2 Tapped density (Dt)*

It is the proportion of the powder's total mass to its tapped volume. By tapping the powder to a fixed volume, the tapped volume was calculated. It is calculated using a formula and expressed in gm/ml,

$$\mathbf{D}\_{\mathbf{b}} = \mathbf{M} / \mathbf{V}\_{\mathbf{t}}.\tag{2}$$
