Density armour bedding material

Density (volumetric mass density or specific mass) is the ratio of a substance's mass to its volume.

Note: Greek letter $\zeta$ is used because both the Greek letter $\rho$ and the Latin letter $D$ were in use.

Symbol
$\zeta_{ab}$
Unit
g/cm$^3$

Default
0.93

Formulas
$\frac{\zeta_{ab,1} t_{ab,1}+\zeta_{ab,2} t_{ab,2}}{t_{ab}}$
Used in
$m_{ab}$