Specific Gravity - ASTM D792
The ratio of material density (mass per unit volume) at 23°C to the density of gas-free distilled water at 23°C. Specific gravity can be converted to density (g/cm3) by multiplying specific gravity by 0.9975.
Two procedures are used for specific gravity testing.
|A||Testing in water||(apparent mass in air) / (apparent mass in water)|
|B||Testing in liquids other than water||(apparent mass in air) * (specific gravity of liquid) / (apparent mass in liquid)|